Escobar, B. 2016. Short essay on Plato’s Republic and universal Russell: about practical idealism of Plato and the contemplative nature of the materialism of Russell in the light of Marx. Realidad: Revista de Ciencias Sociales y Humanidades. 140 (Feb. 2016), 213–227. DOI:https://doi.org/10.5377/realidad.v0i140.2388.