The Theory of Evolution by Natural Selection is one of the most significant scientific theories in history. It explains how organisms change over time and how new species arise. But who formulated this theory?

Charles Darwin

The most well-known figure associated with the theory of evolution by natural selection is Charles Darwin. Darwin was an English naturalist who lived during the 19th century. He is famous for his book, “On the Origin of Species,” which was published in 1859.

Darwin spent many years studying different species of plants and animals, both at home in England and during his travels around the world on the HMS Beagle. His observations led him to develop the theory of evolution by natural selection.

Alfred Russel Wallace

While Charles Darwin is often credited with formulating the theory of evolution by natural selection, he wasn’t alone in his thinking. Another scientist, Alfred Russel Wallace, independently came up with a similar theory around the same time.

Wallace was also an English naturalist who had traveled extensively and studied many different species. He wrote a letter to Darwin outlining his ideas about natural selection, which prompted Darwin to finally publish his own work on the subject.


So while Charles Darwin is typically given credit for formulating the theory of evolution by natural selection, it’s important to recognize that he wasn’t working alone. Alfred Russel Wallace also played a significant role in developing this groundbreaking idea.

Both men based their theories on careful observation and analysis of various species, and their work has had a profound impact on our understanding of biology and the natural world as a whole.