The extent to which German big business aided Hitler in his rise to power is still a matter of controversy. For Marxists, or at least those who follow the Moscow line, there is no problem, since they regard Nazism as a manifestation of the monopoly stage of capitalism. Non-Marxists, however, are widely divided. Some have reached conclusions similar to those of the Marxists; others have exonerated the capitalists. Most have concluded that big business gave some support to the Nazis but have not specified its extent or significance. In part, this wide range of opinion is the result of ideological differences. But just as importantly, the evidence on which existing studies of the subject rest is scanty, sometimes ambiguous, and often of questionable validity. Few aspects of National Socialism have been so inadequately researched. Even the most basic facts remain in doubt, and before any further general interpretations can usefully be put forward toward a resolution of the controversy, it is necessary to return to the fundamental task of setting the record straight. A great deal more evidence is available for this purpose than is generally recognized, enough, in fact, to clear up many disputed issues and produce more than a few surprises. A case in point is that of Emil Kirdorf, long universally regarded as an early and loyal backer of Hitler and National Socialism in the camp of big business.