Intelligent design arguments were particularly powerful among the better educated up to the 18th century, because there seemed no alternative explanation. While God came under pressure on a number of fronts in the latter 18th century on, the cake was iced by Darwin's book 1859. It didn't introduce the idea of evolution but it suddenly gave it massive credibility across all classes.Grown ups know that intelligent design theory would exist if the bible did not exist. Therefore.....
Evolution has the additional advantage of explaining things by means of testable (ie falsifiable) statements.
Intelligent design, by contrast,
explains nothing, since it relies on magic without offering any credible demonstration that magic exists, or any credible hypothesis how magic works, and
proceeds by assertion and not by demonstration, and
attempts to use fallacious arguments, not least the argument from ignorance (you can't explain that, therefore God did it)
and so on.proceeds by assertion and not by demonstration, and
attempts to use fallacious arguments, not least the argument from ignorance (you can't explain that, therefore God did it)