Evolutionary Theory – An Overview

Evolutionary Theory


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Evolutionary theory is a scientific theory that explains the origins and diversity of life on Earth. It is based on the observation that species change over time, and that all life on Earth is related. Evolutionary theory is supported by evidence from many different scientific disciplines, including genetics, paleontology, and molecular biology. Scientific evidence for evolution can be found in the fossil record, biodiversity, and DNA sequences.

Development with time:

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Evolutionary theory has developed over time through scientific inquiry, culminating in its modern form with Principles of Population Genetics by George R. Price and evolutionary synthesis by Theodosius Dobzhansky and Julian Huxley. These developments were paralleled by an enormous increase in understanding of genetics and molecular biology, giving a precise theoretical basis to evolutionary explanations for observations in paleontology, morphology, physiology, ecology, and behavior. There is now overwhelming evidence that all life on Earth is descended from a common ancestor. The theory of evolution provides a significant basis to explain biodiversity and the adaptation of organisms to their environments.

Diversity and Adaptation:

In addition, evolutionary theory explains both diversity and adaptation arising from random changes (“random drift”) followed by natural selection working on those changes, the main details of evolutionary processes. Random mutation is the source of the raw material needed for natural selection, and variation in life forms provides much of that material. The mechanisms of evolutionary theory also include genetic drift, migration (of genes or entire species), and nonrandom mating (which can be influenced by sexual selection).

Historical Changes:

So far as the overall impact on historical change is concerned, it is not always possible to establish what percentage was due to evolution versus other factors such as migration, but biologists believe that genetic changes are at least partially responsible for many key events in prehistory, the emergence of humans from Africa; the extinction of dinosaurs; the transformation of apes into human ancestors; and so forth. However, there are examples where understanding past events have become very difficult without knowledge of evolution. For example, archeologists studying early human tools from around the world have found a definite pattern in tool types and their development over time that is best explained by a theory of progressive evolution.

Relations with Living Things:

In addition to explaining how life changes over time, evolutionary theory also predicts some relationships between living things based on their common ancestry. For example, Darwin’s law of universal gravitation states that all organisms fall into the categories of producers or consumers as defined above. By definition, these are individuals who do not consume other members of the same population as food but use energy from sources such as sunlight to produce organic molecules from simpler chemicals. Producers have many similarities with each other and so tend to be close relatives of one another compared with those who cannot make food for themselves. This is why producers are usually found in the same kinds of environments (especially geographical locations) and often share similar adaptations (such as photosynthesis).


This article has explored how evolutionary theory can help you better understand the behavior of your customers. Many techniques have been described that will help you create effective customer profiles, find common traits between customers, determine what motivates your customers to buy, and more.

Evolutionary Theory is the foundation for many of the most popular approaches used by businesses today. Understanding these concepts can make you a better marketer because it helps you learn about the why behind product purchases. Use this information to enhance your marketing campaigns.

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