What is Darwin's evolution theory?

Darwin observed that living organisms have variations in their offspring.

Darwin realized that not all the offspring could survive. (that there would be a struggle for survival)

Darwin made a comparison with artificial selection where farmers would select the animals best suited to their priorities to survive and breed. Darwin called this idea natural selection.

Darwin looked at the changes that artificial selection could make in pigeons and extrapolated that these changes over a vast period of time could result in the formation of a totally new species which would not be a pigeon.

Darwin Then extrapolated backwards and theorized that over time natural selections could account for all the variations in living things that are observed today.

Darwin based his theory on the assumptions of A. everything happens by uniform natural causes observable today B. There is an infinite possibility of variation in the offspring of living things. C. There is a vast period of time for these slow uniform changes to take place. D. That these slow uniform changes could result in an increase of beneficial changes resulting in new and better organisms. E. All life started as a "simple one cell organism that with descent with modification resulted all life on earth

The term "organic evolution" or "evolution" usually refers to Darwin's theory of Descent with Modification, also known as the "tree of life," which held that all life originated from a single "simple" primate cell.

Natural selection would then favor the variations that were more "advanced" than the other variations, causing an inevitable progression of improvement in living things, according to Darwin, who believed that there were infinite possibilities of variations in all organisms.

Mendel's genetic experiments demonstrated that there were only finite and conservative variations in living things, which led to the modification of Darwin's theory by Neo Darwinism, which proposed that mutations are the source of infinite variation.

Darwinian evolution is based on the theory that everything can be explained by slow uniform small changes in living things that, by extrapolation, can explain eventual large changes in living things. Lyell's theory of geological uniformtarism was applied by Darwin to biological systems.

The Enlightenment culture's use of descent with modification was beautiful because it provided an explanation for life without mentioning God or any other supernatural forces; instead, it relied solely on natural causes to uphold the materialist philosophy.

Note that in addition to the standard Neo Darwinian synthesis, evolution can also refer to forms of guided evolution, punctuated equilibrium, adaptive evolution (micro evolution), and other ideas. Descent with modification is still a theory because there is no empirical evidence linking random mutations to a "advance" in genetic information.

Darwin's evolution theory, proposed by Charles Darwin, suggests that species evolve over time through natural selection, where individuals with advantageous traits are more likely to survive and reproduce, passing on those traits to the next generation. This process leads to the gradual change and adaptation of species over successive generations.