The influence of Auguste Comte (1798–1857) in the history of the natural and the social sciences is immense, yet he is seldom read today. These excellent essays—all by leading scholars of 19th-century intellectual history—discuss all aspects of Comte\u27s thought, including his advancement of progressive if authoritarian politics. Comte was a positivist in that he argued that natural and social science should play a positive role in building a new society after the destruction of the ancien régime as a consequence of the French Revolution. As used by Comte, positive implied useful, certain, precise, organic, sympathetic, real, and relative (i.e., relative to human needs). His motto— Order and progress —reflected his twin concerns: namely, o...