This document provides an overview of various perspectives on business strategy presented by notable authors. It begins by summarizing Henry Mintzberg's view of deliberate versus emergent strategy. It then summarizes Michael Porter's perspective on competitive strategy and industry analysis. Next it discusses Clyde Prahalad and Gary Hamel's views on core competencies and strategic intent. The document also summarizes Blue Ocean Strategy proposed by W. Chan Kim and Renee Mauborgne. Finally, it briefly discusses the works of Richard Rumelt, Cynthia Montgomery, A.G. Lafley and Roger Martin, and Rita McGrath regarding defining problems, the role of the strategist, integrated strategic choices, and the end of competitive advantage.