Paul Anthony Samuelson (born May 5, 1915, in Gary, Indiana, USA) was a renowned American economist renowned for his foundational contributions to modern economic theory. A Nobel laureate in Economic Sciences, he was instrumental in shaping the development of microeconomics and macroeconomics in the 20th century. Samuelson's work has had a lasting impact on economic thought and policy, establishing him as one of the most influential economists of his era.