pavel solomonovich yushkevich (; 29 june 1873, odessa – december 6, 1945, moscow) was a russian philosopher. he was a menshevik activist and participated as one of the russian machists in "studies in the philosophy of marxism" in 1908. this publication prompted criticism in lenin's "materialism and empirio-criticism". by the 1920s yushkevich abandoned political activities and worked at the marx-engels institute in moscow from 1922.