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Darwin's Principles

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Introduction

Jessica Gunn Essay 1 Darwin's Principles During the time when Charles Darwin was alive (1809-1882) most of the Western culture believed that the world was created by God and only several thousand years old. They believed that our world was always like it was then. So when Darwin wrote The Origin of Species it shook up both the cultural and scientific views of his time. His views that evolution occurs by natural selection was one of the most radial theories during his time, yet today is widely accepted as a fact among most of the world. The first principle of Darwin's theory is that individuals vary in many heritable traits, and that no two individuals are exactly alike. ...read more.

Middle

His second principle is that the reproductive potential of a population would increase exponentially if all individuals reproduced successfully, far exceeding the capacity of the environmental resources to support it. This inequality creates a struggle for survival among individuals within that environment. This struggle leads to the death of the individuals who are not able to survive within the environments limitations, and the only individual remaining reproduce. Depending on the resources that are available, as in food, water, weather, etc., part of the population will not be able to survive and reproduce. Third, individuals who are best fit for the current environment leave a disproportionaly large number of offspring compared to individuals who are not fit. ...read more.

Conclusion

The fourth principle is the effects of unequal reproductive success over many generations will lead to a gradual change in the population. Thus a species' population can evolve over time; the individual itself does not evolve. The individual's traits may or may not be favored by the environment, helping it to survive and reproduce or eliminating the traits from the gene pool. Charles Darwin revolutionized biology, among all the sciences, in ways most people could not even fathom. During his lifetime it was unheard of to question that the earth and its inhabitants were not made by God, yet he saw things and studied them and came up with a theory that unified most of the sciences we study today. That theory is that evolution occurs by the process of natural selection. Darwin's four main principles do support his theory. ...read more.

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