Labor and human evolution
April 25, 2014
Previously published by the International Socialist Organization.
Material on this Web site is licensed by SocialistWorker.org, under a Creative Commons (by-nc-nd 3.0) license, except for articles that are republished with permission. Readers are welcome to share and use material belonging to this site for non-commercial purposes, as long as they are attributed to the author and SocialistWorker.org.