Whose idea was more powerful - Darwin's good one or his cousin Francis Galton's awful one?
Maria Popova asks how we can find more information we don't know we want to know.
Melvyn Bragg and his guests discuss Social Darwinism.
Melvyn Bragg examines how legitimate it is to call the 20th century the American century.
Jeffrey Sachs argues that many global problems were caused by mistakes at the end of wars.
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