The Communist Manifesto. While a work of great practical import, Marx, as an economist, has been largely discredited since, ohhhh, Eugen Böhm von Bawerk started writing about him in the 1880’s. Which is probably why most academic Marxists can survive only in America’s teacher’s colleges. Sort of explains the country’s Stalinist 5 year plan approach to education, as well as the not entirely unexpected pitiful results. Clue for Parents: If you hear one of your kid’s teachers use the phrase “social justice”, it explains why your kid isn’t learning math | science | history | English | fill in subject matter here.