Drucker's career as a business thinker took off in 1942, when his initial writings on politics and society won him access to the internal workings of General Motors (GM), one of the largest companies in the world at that time. His experiences in Europe had left him fascinated with the problem of authority. He shared his fascination with Donaldson Brown, the mastermind behind the administrative controls at GM. In 1943 Brown invited him in to conduct what might be called a "political audit": a two-year social-scientific analysis of the corporation. Drucker attended every board meeting, interviewed employees, and analyzed production and decision-making processes.