The theory of Darwin’s evolution, also known as the theory of natural selection, is a scientific theory that explains how species evolve over time. It was proposed by Charles Darwin in his book ‘On the Origin of Species’ in 1859 and has since become one of the most widely accepted theories in biology.

What is Natural Selection?

Natural selection is the process by which certain traits become more or less common in a population over time. This occurs because individuals with advantageous traits are more likely to survive and reproduce, passing those traits onto their offspring. On the other hand, individuals with disadvantageous traits are less likely to survive and reproduce, causing those traits to become less common in the population.

The Theory of Evolution

The theory of evolution suggests that all living organisms share a common ancestry and have evolved from a single common ancestor over millions of years. This theory explains how new species arise and why there is such diversity among living organisms today.

Evolution occurs through a process of gradual change, where small genetic variations accumulate over time leading to significant differences between populations. These variations can arise through mutations, gene flow or genetic drift.

Evidence for Evolution

There are various lines of evidence that support the theory of evolution. One such line is comparative anatomy where similarities in bone structure between different species suggest that they share a common ancestor. Another line of evidence is comparative embryology where similarities in early development stages suggest evolutionary relationships between different species.


The theory of Darwin’s evolution is a fundamental scientific theory that has revolutionized our understanding of the natural world. It explains how complex organisms have arisen from simpler ones through a process of gradual change over millions of years. The theory of evolution is supported by multiple lines of evidence and continues to be refined as new discoveries are made.