Darwin's 4 Postulates

Information Darwin Swore By

"The power of Selection, whether exercised by man or brought into play under nature through the struggle for existence and the consequent survival of the fittest, absolutely depends on the variability of organic beings. Without variability, nothing can be effected; slight individual differences, however, suffice for the work, and are probably the chief or sole means in the production of new species." Charles Darwin (1868)

Postulate No.1 - Variation

This postulate is also presented by Charles Darwin as "the Tendency of Species to Form Varieties", and it encompasses exactly that; how one single species can then develop an infinite amount of dissimilar characteristics that will eventually lead into either a variation of itself, or an entirely new and exciting different species.

According to Darwin, variation in species is greatly influenced by internal and external environmental factors that the species might find itself in. Though similar genetic information might be present in the different species, the focus of species variation lies greatly in the phenotypical aspect of species.

Postulate No.2 - Inheritance

This postulate was better known by Charles Darwin as "descent with modification", meaning that when one species mated with the other, some aspects of the parent would be passed on, or inherited, by the offspring, but most certainly, this would be with alterations.

Inheritance is a key postulate in Charles Darwin's theory because it encompasses the idea of sexual reproduction of species in order to produce an offspring with the strongest of characteristics, thus favouring the offspring for the long race that is survival of the fittest.

Postulate No.3 - Differential Survival

Better exposed by Darwin as "survival of the fittest", differential survival encompasses the ideas of hardships and challenges faced by species all over the world and their ability to adapt to these conditions. When there is limited face, food, or a competition of resource, species are bound to fight for their survival.

According to Darwin and this postulate of differential survival, it is the fittest species that is bound to survive the hardships, thus eliminating the weaker kind and assuring an environment for the strongest.

Postulate No.4 - Extinctions

The term extinction refers to the complete dying out of a whole group of species, a concept Darwin considered highly important for his theory on evolution. Regarding extinctions, this postulate from Darwin's theory was one in which Darwin had some deep and interesting insight, sometimes contradictory to the beliefs of other scientists.

First and foremost, Darwin truly believed that the rate at which species became extinct was much slower than the rate at which the population of these species had surged. He suggested that there was no such thing as "Mass Extinctions", an idea pitched in by many scientists of the time which encompasses the idea of a sudden disappearance of species, but it was rather a misreading on the gap of information.


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