The analytic program in philosophy is ordinarily dated to the work of English philosophers Bertrand Russell and G.E. Moore in the early 20th century, building on the work of the German philosopher and mathematician Gottlob Frege. They turned away from then-dominant forms of Hegelianism (objecting in particular to its idealism and purported obscurity) and began to develop a new sort of conceptual analysis based on recent developments in logic. The most prominent example of this new method of conceptual analysis is Russell's 1905 paper "On Denoting", a paper that is widely seen to be the exemplar of the analytic program in philosophy.