Differential reproductive success of variant replicators.
Natural selection.
Darwin's theory of evolution by natural selection was better than other theories of his time because it provided a mechanism (natural selection) to explain how evolution occurs. It was supported by evidence from various scientific disciplines such as geology, paleontology, and morphology. Additionally, Darwin's theory was able to explain the diversity of life on Earth in a simple and elegant way.
There is no " theory of evolution " as evolution is a fact. The theory is; the theory of evolution by natural selection and explains much about the fact of evolution. Charles Robert Darwin and Alfred Russel Wallace come up with the theory of evolution by natural selection, though natural selection is a phrase coined by Darwin.
a phrase is 3or 4 words in a sentence that describe something.
The correct phrase is "tickling your taste buds." This phrase is commonly used to describe the sensation of enjoying flavorful food. "Tickling your tonsils" doesn't make sense in the context of taste perception.
The catch phrase for the concept of social Darwinism was "survival of the fittest." This phrase was coined by Herbert Spencer to describe the belief that competition and natural selection should be applied to human societies as well.
Darwin used the phrase "descent with modification" in his book "On the Origin of Species" instead of the word "evolution." He used this phrase to describe the process by which species change over time through natural selection.
descent with modification
Differential reproductive success of variant replicators.
The phrase commonly used to describe the event horizon in black holes is "point of no return."
Daylighting is a term used to describe maximising natural light in a space.
Natural selection.
"Without your permission" is a phrase. It is commonly used to describe actions or events that occur without one's approval or consent.
Survival of the fittest is a not quite accurate phrase for natural selection. Natural selection is, The non-random survival and reproductive success of randomly varying organisms.
The phrase used to describe this concept is "survival of the fittest," which is based on the idea of natural selection proposed by Charles Darwin. Organisms that are better adapted to their environment have a higher likelihood of surviving and passing on their advantageous traits to their offspring.
Herbert Spenser used the phrase first after reading Charles Darwin's The Origin of Species in 1864. Herbert Spenser was a biologist and sociologist and did write about evolution before Charles Darwin
Notably, the phrase 'survival of the fittest' is a particularly poor choice of words for describing natural selection, in my opinion. Mainly because, in the perception of the layman, it might be taken to mean that natural selection is a black-and-white phenomenon, always favouring more able variants, and that ability (fitness) is measured in terms of health, strength, intelligence, rather than ability to produce offspring. A far more accurate phrase would be: differential reproductive success - meaning the difference in numbers of surviving fertile offspring between variants.