His career as a business thinker took off in the 1940s, when his initial writings on politics and society won him access to the internal workings of General Motors, which was 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. Brown invited him in to conduct what might be called a political audit. The resulting "Concept of the Corporation" popularized GM's multidivisional structure and led to numerous articles, consulting engagements, and additional books.
Drucker was interested in the growing importance of people who worked with their minds rather than their hands. He was intrigued by employees who know more about certain subjects than their bosses or colleagues and yet had to cooperate with others in a large organization. Rather than simply glorify the phenomenon as the epitome of human progress, Drucker analyzed it and explained how it challenged the common thinking about how organizations should