The Art of War — Sun Tzu (5th century BC)

Sun Tzu's The Art of War, composed around 500 BCE, has influenced military strategy, business tactics, and political thought for over two millennia. Its core precept—know yourself and know your enemy, and you will win every battle—has been adopted by leaders from Napoleon to modern CEOs, with more than 200 annotated editions in print today. The text's 13 concise chapters contain timeless principles like "the supreme art of war is to subdue the enemy without fighting," which has inspired non-violent resistance movements. A 2020 survey of Fortune 500 executives found it ranked as the second most influential strategy book, trailing only #7 Sapiens in overall impact. Its long-term influence outpaces #8 A Brief History of Time in practical application across diverse fields.