This paper examines critically the role of the law of the tendency of the falling rate of profit in the geographic expansion (globalization) of competitive capitalism. It contends that Marx did not believe there was an iron-clad connection between the falling rate of profit and globalization; in addition, it argues that Marx believed that the capitalists′ insatiable search for colonial markets was driven by their desire to overcome recurrent (and growing) realization problems in the home market arising from deficient aggregate demand on the part of both workers and capitalists.