Communism | The 20th century | World history | Khan Academy
Why the open web links it
Provides an overview of communism and Marxist-Leninist states in the 20th century.
Linked by 6 independent sites, 2 of them widely read in the 2026-10 crawl of the open web, including sagepub.com, libretexts.org, caul.edu.au, arlt-foundation.org, factmyth.com.