Peter Drucker
Peter Ferdinand Drucker (/ˈdrʌkər/; German: [ˈdʀʊkɐ]; November 19, 1909 – November 11, 2005) was an Austrian-born American management consultant, educator, and author, whose writings contributed to the philosophical and practical foundations of the modern business corporation. He was also a leader in the development of management education, he invented the concept known as management by objectives, and he has been described as "the founder of modern management".