This article is an overview of the release of the Yellow Book of World Socialism 2011-2012 and the Symposium on World Situation and Social Structure vs. Neo-liberalism and Financial Hegemony，which was co-sponsored by the World Socialism Research Center and the Social Sciences Academic Press on March 2，2012. The symposium focused on topics of the changing class forces in the context of global financial crisis，the international bourgeoisie reconstructed by neo-liberalism，and drastic changes in world situation，highlighting the importance of class differentiation in the context of the widening disparity between the rich and the poor，the intensifying social conflicts and the capitalist crisis. The participants argued that the international monopoly capital is innovating its ways of exploitation to gain super profits，that state monopoly capitalism has created favorable conditions for its transformation into international monopoly capitalism，and that the international bourgeoisie are restructuring（1）their power of restoring capital；and（2）their efforts to promote the integration of commercial capital and financial capital. The international monopoly capital is launching a new form of economic colonization of the world. New economies are emerging. And world socialist movements are on the eve of a revival and new transformation.