How did Alfred Wallace impact the world?

Alfred Wallace significantly impacted the world through his independent formulation of the theory of evolution by natural selection, which he presented alongside Charles Darwin in 1858. His work in biogeography laid the foundation for understanding species distribution and the concept of the "Wallace Line," which highlights the distinct faunal divisions between Asia and Australia. Wallace's advocacy for social reform, conservation, and the importance of biodiversity also contributed to the early environmental movement, influencing subsequent generations of scientists and naturalists. His legacy endures in both evolutionary Biology and environmental conservation efforts.