ONE mark of a great book is a thesis so powerful that after a few years people take it for granted. Thomas Sowell’s A Conflict of Visions (1987) is such a book. Its thesis: The policy arguments between liberals and conservatives, socialists and libertarians, do not arise just from differences in priorities regarding freedom, equality, and security. At root, they draw from different conceptions of the nature of man. The Left holds an unconstrained vision: Given the right political and economic arrangements, human beings can be improved, even perfected. Success is defined by what people have the potential of becoming, not by people as they are. The Right holds a constrained vision: People come to society with innate characteristics that cannot be reshaped and must instead be accommodated. Success in political and economic policy must be defined in light of those innate characteristics.
Once you have this framework in your head, the history of the great political debates of the 20th century coheres in a new way. The expansion of the welfare state, how to deal with crime, how to conduct the Cold War, the feminist revolution, colorblind policies versus affirmative action, who should control the schools-whatever the topic, the positions held by Left and Right make sense in terms of each side’s underlying vision of the nature of man.





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