How did the scopes trial illustrate the urban-rural split in the 1920s

It showed who was for or against Darwin's theories

Explanation:

Darwinism divided the public into two clear beliefs according to origin. Like this:

Those of urban origin were more inclined to assimilate Darwin's theories, evolution and adaptations of species to the environment.

Those of rural origin manifested an firm belief in the Bible and in Christian principles, rejecting any evolutionary theory.