Why Is Evolution Considered a Scientific Theory?


Vincent White

Evolution is a scientific theory that has been widely accepted by the scientific community for many years. It is an explanation of how species change and adapt over time through natural selection.

But why is evolution considered a scientific theory? Let’s dive into it.

The Scientific Method
To understand why evolution is considered a scientific theory, we first need to understand what the scientific method is. The scientific method is a process that involves making observations, asking questions, forming hypotheses, conducting experiments, and analyzing data to draw conclusions. Science relies on evidence and experimentation to support or refute hypotheses.

Empirical Evidence
One of the main reasons why evolution is considered a scientific theory is because there is empirical evidence to support it. Empirical evidence refers to evidence that can be observed or measured through experimentation or observation. In the case of evolution, there are numerous pieces of empirical evidence that support the theory.

For example, the fossil record provides evidence of extinct species and transitional fossils that show how species have changed over time. DNA analysis has also provided evidence for common ancestry among organisms. These are just a few examples of empirical evidence that supports the theory of evolution.

Prediction and Testability
Another reason why evolution is considered a scientific theory is because it makes predictions that can be tested through experimentation. A prediction is a statement about what may happen in the future based on current knowledge and understanding.

For example, one prediction made by evolutionary theory is that if two populations are isolated from each other for long enough periods of time, they will eventually become different species due to accumulated genetic differences. This prediction can be tested by observing populations that have been geographically isolated from each other for long periods of time.

The fact that evolutionary predictions can be tested through experimentation makes it a scientifically valid theory.

  • Peer Review

Scientific theories must also undergo peer review, which is a process where other scientists evaluate the validity and reliability of the research. Peer review ensures that scientific research is accurate, reliable, and valid.

The theory of evolution has undergone extensive peer review over the years. Scientists from all over the world have contributed to the body of knowledge surrounding evolution, and their work has been reviewed by their peers to ensure its accuracy and reliability.


In conclusion, evolution is considered a scientific theory because it meets the criteria for a scientific theory. It is supported by empirical evidence, makes predictions that can be tested through experimentation, and has undergone extensive peer review.

As with any scientific theory, there is always room for further research and refinement. But based on what we currently know about evolution, it remains one of the most well-supported scientific theories in existence today.