(1932 - 1976) ~ Uruguayan Anarchist Militant, Head of the Uruguayan Graphic Workers' Union, Co-founder and the First Secretary of the Plenario Intersindical De Trabajadores - Convenci?n Nacional De Trabajadores (PIT-CNT)

(1914 - 1999) ~ Professor of Economics at Cornell University, a Noted U.S. Labor Historian and Economist, Ph.D Graduate of Columbia University : a professor of economics at Cornell University and a noted U.S. labor historian and economist. He received his bachelor's degree in 1934, his Master of Science in 1935 and his Ph.D. in 1940?all from Columbia University. (From : Wikipedia.org.)

(1894 - 1956) ~ American Biologist, Professor of Entomology and Zoology, and Sexologist who Founded the Institute for Sex Research at Indiana University in 1947 : Alfred Charles Kinsey was an American sexologist, biologist, and professor of entomology and zoology who, in 1947, founded the Institute for Sex Research at Indiana University, now known as the Kinsey Institute for Research in Sex, Gender, and Reproduction. He is best known for writing Sexual Behavior in the Human Male (1948) and Sexual Behavior in the Human Female (1953), also known as the Kinsey Reports, as well as for the Kinsey scale. (From : Wikipedia.org.)

(1803 - 1872) ~ 19th-Century, European Secularist and Civil Rights Activist : A Prussian physician and politician. In particular, he campaigned for equal rights for Jews. (From : Wikipedia.org.)

(1916 - 1962) ~ American Sociologist, and a Professor of Sociology at Columbia University from 1946 until his Death in 1962 : An American sociologist, and a professor of sociology at Columbia University from 1946 until his death in 1962. Mills published widely in both popular and intellectual journals, and is remembered for several books, such as The Power Elite, White Collar: The American Middle Classes, and The Sociological Imagination. (From : Wikipedia.org.)

"Industrial Socialism," by Frank Bohn and William D. Haywood, Part 2: Industrial Progress.

"The First Socialist Society: A History of the Soviet Union from Within," by Geoffrey Hosking, published by Harvard University Press, 1985.

"The Social Contract, or the Principles of Right," by Jean Jacques Rousseau, 1762, Translated by G. D. H. Cole.

"Germany's Drive to the East and the Ukrainian Revolution, 1917-1918," by Oleh S. Fedyshyn, Rutgers University Press, New Brunswick, New Jersey, 1971.