Major political and economic shifts have marked the turn into the 21st century: the collapse of the Soviet bloc; the rise to prominence of ecological issues; social changes generated by globalization; and, most recently, one of the worst world financial crises ever. These developments compel us to examine the capitalist system with a critical eye and to reflect on the need for alternatives. The 150th anniversary of the birth of the International Workingmen's Association (IWA) (1864-2014) offers an important opportunity to compare present mainstream paradigms and the political platform developed by the IWA in order to better address our contemporary [crisis?] and theorize solutions. This sourcebook introduces and contextualizes the most valuable notes and proceedings from these legendary me