Just as the new social movements were on the rise, the economic basis of the social democratic consensus was beginning to fall apart. The 1970s saw surging energy prices, the collapse of the Bretton Woods system, the growth of global capital flows, persistent stagflation and falling capitalist profits. This effectively ended the basic political settlement that had supported the postwar era: that unique nexus of Keynesian economic policy, Fordist–corporatist industrial production and the broadly social democratic consensus that returned a part of the social surplus back to workers. Across the world, the structural crisis presented an opportunity for the forces of both the broad left and the broad right to generate a new hegemony that could resolve it.
just a good summary
(unfortunately the "broad right" won that battle ... for now)