"Scientific socialism" . . . . "Marxist socialism" . . . . . . . . . "scientific socialists" . . . "Evolutionary socialism" . . . . "scientific socialist" . . "science" . "Scientific socialism" . "socialism" . "Scientific Socialism" . . . . . "socialist principals of the time" . . . . . "Scientific socialist" . . . . "scientific understanding" . "Socialists" . . . . "scientific" . . "Scientific socialists" . "scientific socialism" .