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A fact from World-system appeared on Wikipedia's Main Page in the Did you know column on 6 February 2011 (check views). The text of the entry was as follows:
Did you know... that in world-system theory, sociologists debate whether two world-systems have ever existed during the same period?
Check out Wikipedia:Splitting. When subtopics grown enough, they are split off. World-system is a crucial part of the world-system theory, also it is a concept notable in its own right. If you disagree, try WP:AFD. --Piotr Konieczny aka Prokonsul Piotrus| talk 06:57, 6 February 2011 (UTC)[reply]