Marcus' 1961 article as a termination of Russellian dominance in analytic philosophy

This essay argues that 20th century analytic philosophy can be fruitfully d ivided into two periods, the Russell-based extensionalist philosophy of the first half of the century and the Marcus-based intensionalist philosophy o f the second half of the century. The difference between these two philosop hical periods is illustrated by the different analyses Russell and marcus g ive to the sentence 'Scott is Scott' and the different meanings they assign to the sentence 'Identity statements between names are necessarily true if true'. Russell's influential role in analytic philosophy in the first half of this century is well-known, but it has not been until the mid-1990s tha t the decisive role that Marcus' philosophy has played in analytic philosop hy during the second half of the century has begun to be widely recognized.