While Charles Darwin is most famous for his theory of evolution by natural selection, he was not the first scientist to propose a theory about how life evolves.

Here's a breakdown of some earlier figures:

* Anaximander (610-546 BC): A Greek philosopher who proposed that life originated from water and that humans evolved from fish-like creatures.

* Empedocles (490-430 BC): Another Greek philosopher who believed that organisms arose from a combination of four elements (earth, air, fire, and water) and that the fittest survived.

* Aristotle (384-322 BC): Although not proposing a direct evolutionary theory, Aristotle developed a system of classifying organisms based on their complexity, which hinted at the idea of change over time.

* Jean-Baptiste Lamarck (1744-1829): A French biologist who proposed the theory of inheritance of acquired characteristics. He believed that organisms could pass on traits acquired during their lifetime to their offspring. While incorrect, this was a significant step towards understanding evolution.

It's important to note that these early ideas lacked the scientific rigor and evidence that Darwin's theory provided. Darwin's groundbreaking contribution was not just proposing evolution, but also providing a robust mechanism (natural selection) to explain how it happens and gathering extensive evidence to support his theory.