John Maynard Keynes was a renowned British economist whose ideas revolutionized economic theory and practice. Born in 1883, he became a prominent figure during the early 20th century, particularly known for his response to the Great Depression. Keynes advocated for active government intervention in the economy, challenging the classical economic thought that predominated before his time. His seminal work, "The General Theory of Employment, Interest, and Money," published in 1936, laid the groundwork for modern macroeconomic policies and introduced concepts such as aggregate demand and fiscal stimulus. Keynes' approach emphasized the importance of total spending in the economy and its effects on output and inflation. He argued that during economic downturns, government should increase spending to compensate for reduced private sector demand, thereby helping to stabilize the economy. His theories led to the development of Keynesian economics, which became the foundation for many government policies aimed at managing economic cycles. Keynesianism gained significant traction in the mid-20th century, influencing various governments' fiscal strategies. John Maynard Keynes not only left a profound legacy in economic theory but also contributed to various institutions, including the International Monetary Fund and the World Bank. His ideas remain influential today, as policymakers continue to debate the roles of government spending and regulation in fostering economic stability. Keynes passed away in 1946, but his insights into economic behavior and policy remain relevant in contemporary discussions regarding economic crises and recovery strategies. John Maynard Keynes was a significant British economist who fundamentally changed economic thought and policy in the 20th century. His advocacy for government intervention in the economy emerged particularly during the Great Depression, highlighting the need for active fiscal policies. Keynes' legacy continues to influence economic theory and practice, as his ideas remain central to discussions about managing economic crises and stability.