 Citing similar examples of women's strike action in hunter-gatherer and other precolonial traditions around the world, some anthropologists argue that it was thanks to solidarity of this kind—especially collective resistance to the possibility of rape—that language, culture, and religion became established in our species in the first instance.This controversial hypothesis is known as the "Female Cosmetic Coalitions", "Lysistrata", or "sex strike" theory of human origins.In October 1997, the chief of the Military of Colombia, General Manuel Bonnet publicly called for a sex strike among the wives and girlfriends of the Colombian left-wing guerrillas, drug traffickers, and paramilitaries as part of a strategy—along with diplomacy—to achieve a ceasefire.