The performance which follows, like Caesar's Gaul, falls into three parts. Part I consists in a sympathetic and reconstructive criticism of Sir Karl Popper's The Poverty of Historicism . Part II offers a somewhat less sympathetic critique of the critique of Popper offered in E. H. Carr's Trevelyan Lectures What is History? . Finally, in a shorter Part III, there will be some conclusions concerning what sociologists and historians can and cannot hope to discover about necessities and impossibilities in human (...) affairs. (shrink)