hereditarianism

As a letter s

is the letter s with a.

As a noun hereditarianism is

the school of thought that heredity is more important than factors such as environment in determining intelligence and behaviour.

As nouns the difference between hereditarianism and environmentalism

is that hereditarianism is the school of thought that heredity is more important than factors such as environment in determining intelligence and behaviour while environmentalism is (medicine|social sciences) a theory that views environment, rather than heredity or culture, as the important factor in the development of an individual or group.

As nouns the difference between taxonomy and hereditarianism

is that taxonomy is the science or the technique used to make a classification while hereditarianism is the school of thought that heredity is more important than factors such as environment in determining intelligence and behaviour.