What Is Darwinian Theory of Evolution?


Martha Robinson

The Darwinian Theory of Evolution, also known as the Theory of Natural Selection, is a scientific explanation for how species change over time. It was first proposed by Charles Darwin in his seminal work, “On the Origin of Species,” published in 1859.

What is the Darwinian Theory of Evolution?

According to the Darwinian Theory of Evolution, all species have evolved over time from a common ancestor through a process called natural selection. This process occurs because of genetic variation within a population. Some individuals within the population are better adapted to their environment than others and therefore have a greater chance of surviving and reproducing.

How does natural selection work?

Natural selection works by selecting traits that are advantageous for survival and reproduction. For example, if a population of birds has long beaks and short beaks, but the food they eat requires them to have long beaks to reach it, then over time those birds with short beaks will die out while those with long beaks will survive and produce offspring with long beaks.

  • In this way, advantageous traits are passed on from generation to generation.
  • Over time, these small changes can accumulate and result in significant differences between populations.

Evidence for the Darwinian Theory

There is strong evidence that supports the Darwinian Theory of Evolution. One such piece of evidence is the fossil record. Fossils provide us with a glimpse into the past and show us how species have changed over millions of years.

Another piece of evidence is comparative anatomy. Different species may have similar structures that serve different purposes. For example, the wings of birds and bats are very similar in structure despite being used for different activities – flying versus gliding.


The Darwinian Theory of Evolution has been widely accepted as one of the most important scientific theories of all time. It provides a compelling explanation for how species change over time and has provided the basis for many subsequent scientific discoveries.

By understanding how natural selection works, we can better appreciate the incredible diversity of life on our planet and how it has come to be.