by Caleb Nelson
[ix] Howard Chandler Christy, Scene at the Signing of the Constitution of the United States, (1940). [Public Domain], via Wikimedia Commons.
[x] Portrait of Journalist and Economist Henry Hazlitt. By work-for-hire (Mises Institute; Henry Hazlitt estate) [CC-BY-3.0 (creativecommons.org/licenses/by/3.0)], [Public Domain], via Wikimedia Commons.
[xi] According to clause 50 of the Copyright Act of Zimbabwe, Chapter 26:1, this work is in the public domain because it is either an image of a bank note which has been demonetized in terms of the Reserve Bank of Zimbabwe Act Chapter 22:10, or an image of a coin or the artistic work defining the design of a coin.
[xii] Bust of Auguste Comte in Place de la Sorbonne, Paris. By MLWatts (Own work) [CC-BY-SA-3.0 (http://creativecommons.org/licenses/by-sa/3.0)], via Wikimedia Commons.
[xiii] John Dewey by Eva Watson-Schütze (1867-1935) [Public domain], via Wikimedia Commons.
[xiv] Official Presidential Portrait of Woodrow Wilson. By Frank Graham Cootes [Public domain], via Wikimedia Commons.
[xv] Marx, [Public Domain], Wikimedia.
[xvi] Engels, [Public Domain], Wikimedia.
[xvii] Candy bar. By Evan-Amos, [Public Domain], Wikimedia.
[xviii] “Roosevelt” by Frank O. Salisbury - whitehouseresearch.org/assetbank-whha/action/viewHome. Licensed under Public domain via Wikimedia Commons.
[xix] Mussolini and Hitler, [Public Domain], Wikimedia.
[xx] “Cornelius Vanderbilt three-quarter view” by unattributed - Heritage Auction Galleries. Licensed under Public domain via Wikimedia Commons. commons.wikimedia.org/wiki/File:Cornelius_Vanderbilt_three-quarter_view.jpg#mediaviewer/File:Cornelius_Vanderbilt_three-quarter_view.jpg.
[xxi] Camel Contemplating a Needle. www.HallWines.com
[xxii] Washington, [Public Domain], Wikimedia.