Logicism's one of the schools of thought in the philosophy of mathematics, putting forth the theory that mathematics's an extension of logic and therefore some or all mathematics's reducible to logic. Bertrand Russell and Alfred North Whitehead championed this theory fathered by Gottlob Frege. Frege gave up on the project after Russell recognized a paradox exposing an inconsistency in naive set theory. Russell and Whitehead continued on with the project in their Principia Mathematica. Today, the… (More on Logicism)