Nomadism, the hunter-gatherer lifestyle, and minimal investment in shelter and possessions were sensible adaptations to Australia’s ENSO-driven resource unpredictability. When local conditions deteriorated, Aborigines simply moved to an area where conditions were temporarily better. Rather than depending on just a few crops that could fail, they minimized risk by developing an economy based on a great variety of wild foods, not all of which were likely to fail simultaneously. Instead of having fluctuating populations that periodically outran their resources and starved, they maintained smaller populations that enjoyed an abundance of food in good years and a sufficiency in bad years.
The Aboriginal Australian substitute for food production has been termed “firestick farming.” The Aborigines modified and managed the surrounding landscape in ways that increased its production of edible plants and animals, without resorting to cultivation. In particular, they intentionally burned much of the landscape periodically. That served several purposes: the fires drove out animals that could be killed and eaten immediately; fires converted dense thickets into open parkland in which people could travel more easily; the parkland was also an ideal habitat for kangaroos, Australia’s prime game animal; and the fires stimulated the growth both of new grass on which kangaroos fed and of fern roots on which Aborigines themselves fed.
We think of Australian Aborigines as desert people, but most of them were not. Instead, their population densities varied with rainfall (because it controls the production of terrestrial wild plant and animal foods) and with abundance of aquatic foods in the sea, rivers, and lakes. The highest population densities of Aborigines were in Australia’s wettest and most productive regions: the Murray-Darling river system of the Southeast, the eastern and northern coasts, and the southwestern corner. Those areas also came to support the densest populations of European settlers in modern Australia. The reason we think of Aborigines as desert people is simply that Europeans killed or drove them out of the most desirable areas, leaving the last intact Aboriginal populations only in areas that Europeans didn’t want.
Within the last 5,000 years, some of those productive regions witnessed an intensification of Aboriginal food-gathering methods, and a buildup of Aboriginal population density. Techniques were developed in eastern Australia for rendering abundant and starchy, but extremely poisonous, cycad seeds edible, by leaching out or fermenting the poison. The previously unexploited highlands of southeastern Australia began to be visited regularly during the summer, by Aborigines feasting not only on cycad nuts and yams but also on huge hibernating aggregations of a migratory moth called the bogong moth, which tastes like a roasted chestnut when grilled. Another type of intensified food-gathering activity that developed was the freshwater eel fisheries of the Murray-Darling river system, where water levels in marshes fluctuate with seasonal rains. Native Australians constructed elaborate systems of canals up to a mile and a half long, in order to enable eels to extend their range from one marsh to another. Eels were caught by equally elaborate weirs, traps set in dead-end side canals, and stone walls across canals with a net placed in an opening of the wall. Traps at different levels in the marsh came into operation as the water level rose and fell. While the initial construction of those “fish farms” must have involved a lot of work, they then fed many people. Nineteenth-century European observers found villages of a dozen Aboriginal houses at the eel farms, and there are archaeological remains of villages of up to 146 stone houses, implying at least seasonally resident populations of hundreds of people.
Still another development in eastern and northern Australia was the harvesting of seeds of a wild millet, belonging to the same genus as the broomcorn millet that was a staple of early Chinese agriculture. The millet was reaped with stone knives, piled into haystacks, and threshed to obtain the seeds, which were then stored in skin bags or wooden dishes and finally ground with millstones. Several of the tools used in this process, such as the stone reaping knives and grindstones, were similar to the tools independently invented in the Fertile Crescent for processing seeds of other wild grasses. Of all the food-acquiring methods of Aboriginal Australians, millet harvesting is perhaps the one most likely to have evolved eventually into crop production.
Along with intensified food gathering in the last 5,000 years came new types of tools. Small stone blades and points provided more length of sharp edge per pound of tool than the large stone tools they replaced. Hatchets with ground stone edges, once present only locally in Australia, became widespread. Shell fishhooks appeared within the last thousand years.
WHY DID AUSTRALIA not develop metal tools, writing, and politically complex societies? A major reason is that Aborigines remained hunter-gatherers, whereas, as we saw in Chapters 12–14, those developments arose elsewhere only in populous and economically specialized societies of food producers. In addition, Australia’s aridity, infertility, and climatic unpredictability limited its hunter-gatherer population to only a few hundred thousand people. Compared with the tens of millions of people in ancient China or Mesoamerica, that meant that Australia had far fewer potential inventors, and far fewer societies to experiment with adopting innovations. Nor were its several hundred thousand people organized into closely interacting societies. Aboriginal Australia instead consisted of a sea of very sparsely populated desert separating several more productive ecological “islands,” each of them holding only a fraction of the continent’s population and with interactions attenuated by the intervening distance. Even within the relatively moist and productive eastern side of the continent, exchanges between societies were limited by the 1,900 miles from Queensland’s tropical rain forests in the northeast to Victoria’s temperate rain forests in the southeast, a geographic and ecological distance as great as that from Los Angeles to Alaska.
Some apparent regional or continentwide regressions of technology in Australia may stem from the isolation and relatively few inhabitants of its population centers. The boomerang, that quintessential Australian weapon, was abandoned in the Cape York Peninsula of northeastern Australia. When encountered by Europeans, the Aborigines of southwestern Australia did not eat shellfish. The function of the small stone points that appear in Australian archaeological sites around 5,000 years ago remains uncertain: while an easy explanation is that they may have been used as spearpoints and barbs, they are suspiciously similar to the stone points and barbs used on arrows elsewhere in the world. If they really were so used, the mystery of bows and arrows being present in modern New Guinea but absent in Australia might be compounded: perhaps bows and arrows actually were adopted for a while, then abandoned, across the Australian continent. All these examples remind us of the abandonment of guns in Japan, of bows and arrows and pottery in most of Polynesia, and of other technologies in other isolated societies (Chapter 13).
The most extreme losses of technology in the Australian region took place on the island of Tasmania, 130 miles off the coast of southeastern Australia. At Pleistocene times of low sea level, the shallow Bass Strait now separating Tasmania from Australia was dry land, and the people occupying Tasmania were part of the human population distributed continuously over an expanded Australian continent. When the strait was at last flooded around 10,000 years ago, Tasmanians and mainland Australians became cut off from each other because neither group possessed watercraft capable of negotiating Bass Strait. Thereafter, Tasmania’s population of 4,000 hunter-gatherers remained out of contact with all other humans on Earth, living in an isolation otherwise known only from science fiction novels.
When finally encountered by Europeans in A.D. 1642, the Tasmanians had the simplest material culture of any people in the modern world. Like mainland Aborigines, they were hunter-gatherers without metal tools. But they also lacked many technologies and artifacts widespread on the mainland, including barbed spears, bone tools of any type, boomerangs, ground or polished stone tools, hafted stone tools, hooks, nets, pronged spears, traps, and the practices of catching and eating fish, sewing, and starting
a fire. Some of these technologies may have arrived or been invented in mainland Australia only after Tasmania became isolated, in which case we can conclude that the tiny Tasmanian population did not independently invent these technologies for itself. Others of these technologies were brought to Tasmania when it was still part of the Australian mainland, and were subsequently lost in Tasmania’s cultural isolation. For example, the Tasmanian archaeological record documents the disappearance of fishing, and of awls, needles, and other bone tools, around 1500 B.C. On at least three smaller islands (Flinders, Kangaroo, and King) that were isolated from Australia or Tasmania by rising sea levels around 10,000 years ago, human populations that would initially have numbered around 200 to 400 died out completely.
Tasmania and those three smaller islands thus illustrate in extreme form a conclusion of broad potential significance for world history. Human populations of only a few hundred people were unable to survive indefinitely in complete isolation. A population of 4,000 was able to survive for 10,000 years, but with significant cultural losses and significant failures to invent, leaving it with a uniquely simplified material culture. Mainland Australia’s 300,000 hunter-gatherers were more numerous and less isolated than the Tasmanians but still constituted the smallest and most isolated human population of any of the continents. The documented instances of technological regression on the Australian mainland, and the example of Tasmania, suggest that the limited repertoire of Native Australians compared with that of peoples of other continents may stem in part from the effects of isolation and population size on the development and maintenance of technology—like those effects on Tasmania, but less extreme. By implication, the same effects may have contributed to differences in technology between the largest continent (Eurasia) and the next smaller ones (Africa, North America, and South America).
WHY DIDN’T MORE-ADVANCED technology reach Australia from its neighbors, Indonesia and New Guinea? As regards Indonesia, it was separated from northwestern Australia by water and was very different from it ecologically. In addition, Indonesia itself was a cultural and technological backwater until a few thousand years ago. There is no evidence of any new technology or introduction reaching Australia from Indonesia, after Australia’s initial colonization 40,000 years ago, until the dingo appeared around 1500 B.C.
The dingo reached Australia at the peak of the Austronesian expansion from South China through Indonesia. Austronesians succeeded in settling all the islands of Indonesia, including the two closest to Australia—Timor and Tanimbar (only 275 and 205 miles from modern Australia, respectively). Since Austronesians covered far greater sea distances in the course of their expansion across the Pacific, we would have to assume that they repeatedly reached Australia, even if we did not have the evidence of the dingo to prove it. In historical times northwestern Australia was visited each year by sailing canoes from the Macassar district on the Indonesian island of Sulawesi (Celebes), until the Australian government stopped the visits in 1907. Archaeological evidence traces the visits back until around A.D. 1000, and they may well have been going on earlier. The main purpose of the visits was to obtain sea cucumbers (also known as bêche-demer or trepang), starfish relatives exported from Macassar to China as a reputed aphrodisiac and prized ingredient of soups.
Naturally, the trade that developed during the Macassans’ annual visits left many legacies in northwestern Australia. The Macassans planted tamarind trees at their coastal campsites and sired children by Aboriginal women. Cloth, metal tools, pottery, and glass were brought as trade goods, though Aborigines never learned to manufacture those items themselves. Aborigines did acquire from the Macassans some loan words, some ceremonies, and the practices of using dugout sailing canoes and smoking tobacco in pipes.
But none of these influences altered the basic character of Australian society. More important than what happened as a result of the Macassan visits is what did not happen. The Macassans did not settle in Australia—undoubtedly because the area of northwestern Australia facing Indonesia is much too dry for Macassan agriculture. Had Indonesia faced the tropical rain forests and savannas of northeastern Australia, the Macassans could have settled, but there is no evidence that they ever traveled that far. Since the Macassans thus came only in small numbers and for temporary visits and never penetrated inland, just a few groups of Australians on a small stretch of coast were exposed to them. Even those few Australians got to see only a fraction of Macassan culture and technology, rather than a full Macassan society with rice fields, pigs, villages, and workshops. Because the Australians remained nomadic hunter-gatherers, they acquired only those few Macassan products and practices compatible with their lifestyle. Dugout sailing canoes and pipes, yes; forges and pigs, no.
Apparently much more astonishing than Australians’ resistance to Indonesian influence is their resistance to New Guinea influence. Across the narrow ribbon of water known as Torres Strait, New Guinea farmers who spoke New Guinea languages and had pigs, pottery, and bows and arrows faced Australian hunter-gatherers who spoke Australian languages and lacked pigs, pottery, and bows and arrows. Furthermore, the strait is not an open-water barrier but is dotted with a chain of islands, of which the largest (Muralug Island) lies only 10 miles from the Australian coast. There were regular trading visits between Australia and the islands, and between the islands and New Guinea. Many Aboriginal women came as wives to Muralug Island, where they saw gardens and bows and arrows. How was it that those New Guinea traits did not get transmitted to Australia?
This cultural barrier at Torres Strait is astonishing only because we may mislead ourselves into picturing a full-fledged New Guinea society with intensive agriculture and pigs 10 miles off the Australian coast. In reality, Cape York Aborigines never saw a mainland New Guinean. Instead, there was trade between New Guinea and the islands nearest New Guinea, then between those islands and Mabuiag Island halfway down the strait, then between Mabuiag Island and Badu Island farther down the strait, then between Badu Island and Muralug Island, and finally between Muralug and Cape York.
New Guinea society became attenuated along that island chain. Pigs were rare or absent on the islands. Lowland South New Guineans along Torres Strait practiced not the intensive agriculture of the New Guinea highlands but a slash-and-burn agriculture with heavy reliance on seafoods, hunting, and gathering. The importance of even those slash-and-burn practices decreased from southern New Guinea toward Australia along the island chain. Muralug Island itself, the island nearest Australia, was dry, marginal for agriculture, and supported only a small human population, which subsisted mainly on seafood, wild yams, and mangrove fruits.
The interface between New Guinea and Australia across Torres Strait was thus reminiscent of the children’s game of telephone, in which children sit in a circle, one child whispers a word into the ear of the second child, who whispers what she thinks she has just heard to the third child, and the word finally whispered by the last child back to the first child bears no resemblance to the initial word. In the same way, trade along the Torres Strait islands was a telephone game that finally presented Cape York Aborigines with something very different from New Guinea society. In addition, we should not imagine that relations between Muralug Islanders and Cape York Aborigines were an uninterrupted love feast at which Aborigines eagerly sopped up culture from island teachers. Trade instead alternated with war for the purposes of head-hunting and capturing women to become wives.
Despite the dilution of New Guinea culture by distance and war, some New Guinea influence did manage to reach Australia. Intermarriage carried New Guinea physical features, such as coiled rather than straight hair, down the Cape York Peninsula. Four Cape York languages had phonemes unusual for Australia, possibly because of the influence of New Guinea languages. The most important transmissions were of New Guinea shell fishhooks, which spread far into Australia, and of New Guinea outrigger canoes, which spread down the Cape York Peninsula. New Guinea drums, ceremonial masks, funeral posts, and pipes were
also adopted on Cape York. But Cape York Aborigines did not adopt agriculture, in part because what they saw of it on Muralug Island was so watered-down. They did not adopt pigs, of which there were few or none on the islands, and which they would in any case have been unable to feed without agriculture. Nor did they adopt bows and arrows, remaining instead with their spears and spear-throwers.
Australia is big, and so is New Guinea. But contact between those two big landmasses was restricted to those few small groups of Torres Strait islanders with a highly attenuated New Guinea culture, interacting with those few small groups of Cape York Aborigines. The latter groups’ decisions, for whatever reason, to use spears rather than bows and arrows, and not to adopt certain other features of the diluted New Guinea culture they saw, blocked transmission of those New Guinea cultural traits to all the rest of Australia. As a result, no New Guinea trait except shell fishhooks spread far into Australia. If the hundreds of thousands of farmers in the cool New Guinea highlands had been in close contact with the Aborigines in the cool highlands of southeastern Australia, a massive transfer of intensive food production and New Guinea culture to Australia might have followed. But the New Guinea highlands are separated from the Australian highlands by 2,000 miles of ecologically very different landscape. The New Guinea highlands might as well have been the mountains of the moon, as far as Australians’ chances of observing and adopting New Guinea highland practices were concerned.
Guns, Germs, and Steel Page 36