Peter F. Drucker (1909–2005) was an Austrian-American writer and management consultant widely regarded as the founder of modern management theory. Born in Vienna, Austria, he studied law and worked as a journalist and economist before immigrating to the United States, where he went on to teach at institutions including New York University and Claremont Graduate University. He rose to international acclaim with influential books including The Practice of Management, The Effective Executive, and Management: Tasks, Responsibilities, Practices, works that established management as a distinct discipline and continue to be studied as foundational texts in business education. Drawing on decades of consulting experience with major corporations, nonprofits, and government agencies, he developed enduring concepts including management by objectives and a strong emphasis on the responsibilities of "knowledge workers" in the modern economy, ideas that reshaped how organizations think about leadership and productivity. His influence extended well beyond the corporate world, as he also advised nonprofit and social sector leaders and wrote extensively on the responsibilities of the individual within organizations and society. Known for his rigorous, forward-thinking analysis of organizations and leadership, Drucker's work continues to shape modern management thinking and inspire readers across the world.