John Maynard Smith was a prominent British evolutionary biologist who made significant contributions to the field of evolutionary theory. He is well-known for his work on the evolution of species and for introducing game theory to biology. His analyses helped explain various biological phenomena, including animal behavior and the evolution of cooperation and conflict among species. His innovative approach bridged the gap between biology and mathematics, providing a framework to understand evolutionary strategies. Smith also played a key role in popularizing concepts such as the "selfish gene" and the evolutionary importance of sexual reproduction. He explored how different strategies, both cooperative and competitive, could be advantageous in different environmental contexts. This work not only influenced evolutionary biology but also had implications for fields such as ecology and conservation. Throughout his career, Smith published numerous influential papers and books that expanded the understanding of evolutionary processes. His ability to integrate complex mathematical models with biological concepts earned him a respected place in the scientific community. Smith's legacy continues to inspire future generations of biologists and researchers interested in the complexities of evolution. John Maynard Smith was a leading British evolutionary biologist known for his significant contributions to evolutionary theory and game theory in biology. His work helped clarify the evolution of species, animal behavior, and the dynamics of cooperation and conflict in nature. Smith's innovative approaches, including the integration of mathematics and biology, left a lasting impact on the field, influencing future research and understanding of evolutionary processes.