Revolutions of 1848 carried out, occurred in Greater Poland. Next, the middle classes began to agitate. Karl Marx and Friedrich Engels, working in Brussels, had written "Manifesto of the Communist Party" (published in German in London on February 21, 1848) at the request of the Communist League (an organization consisting principally of German workers). Following the March insurrection in Berlin, they began agitating in Germany. They issued their "Demands of the Communist Party in Germany" from Paris in March; the pamphlet urged unification of Germany, universal suffrage, abolition of feudal duties, and similar middle-class goals. The middle and working classes thus shared a
Race and crime in the United States be understood as an attempt to alleviate either absolute or relative deprivation and adapt to the existing opportunity structure. A more recent approach to strain theory was proposed by Steven F. Messner and Richard Rosenfeld in the 1990s. In their version of the theory, which they refer to as institutional anomie theory, Messner and Rosenfeld argue that the dominance of materialistic concerns and measurements of success manifested in the American Dream weakens the effectiveness of informal social control mechanisms and support processes, which encourages economic gain by any means, legal or illegal. In those segments of the population which experience