sentences:  Co-operative economists - Federalist, Individualist, and otherwise - have presented the extension of their economic model to its natural limits as a goal.This ideal was widely supported in early-twentieth century U.S. and Canadian leftist circles.This ideal, and the language behind it, were central to the formation of the Co-operative Commonwealth Federation party in 1932, which became Canada's largest left-wing political party, and continues to this day as the New Democratic Party.