It might be a reaction to the centuries of the opposite position, that humans are divinely created, and rule the world with the Devine right handed down by god.

It might be a reaction to the centuries of the opposite position, that humans are divinely created, and rule the world with the Devine right handed down by god. So now as the human is picked apart by science, and we see we are just primates, monkeys, and we tend to form groups and throw our crap at each other, the 'just monkeys' seems apt.