What Is the Theory of Evolution via Natural Selection?


Vincent White

The theory of evolution via natural selection is one of the most significant scientific theories of all time. It explains how organisms evolve and adapt to their environment over time. In this article, we will delve into the theory in detail and understand how it works.

What is Evolution?

Evolution is the process by which different species of organisms develop and change over time. The idea of evolution dates back to ancient Greece, but it was Charles Darwin who gave it a scientific basis with his theory of evolution by natural selection.

What is Natural Selection?

Natural selection is the process by which living organisms with advantageous traits survive and reproduce more successfully than those without these traits. This leads to the accumulation of these advantageous traits in the population over time, eventually resulting in a new species.

The Four Principles of Natural Selection:

  • Variation: Individuals within a population vary in their physical and behavioral characteristics.
  • Heredity: Some traits are passed down from parents to offspring.
  • Differential survival: Not all individuals can survive due to limited resources or environmental pressures.
  • Reproduction: Individuals who survive and reproduce pass on their advantageous traits to their offspring.

The Process of Natural Selection

Let’s take an example: Imagine there’s a population of rabbits living in a forest with brown fur. However, due to a genetic mutation, one rabbit is born with white fur.

In this scenario, the white rabbit stands out from the rest because its fur color makes it more visible to predators like foxes. As a result, it has a lower chance of surviving than its brown-furred counterparts.

However, if there’s another mutation that allows the white rabbit to camouflage better in its environment, it will have a higher chance of survival. This trait will be passed down to its offspring, and over time, the white fur trait will become more common within the population.


To summarize, the theory of evolution via natural selection explains how organisms evolve and adapt to their environment over time. It is a process that operates on the principles of variation, heredity, differential survival, and reproduction. Through natural selection, advantageous traits are passed down from generation to generation, leading to the creation of new species.

So there you have it! The theory of evolution via natural selection might seem complex at first glance but breaking it down into simpler components can make it easier to understand.