I think the humility of C18th C19th would fall to the masses and certainly not the ruling classes. Bear in mind that this is the dawn of The Enlightenment, The Age of Reason and the idea of a Magic Man in the sky is not holding against clinical observation. Certainly the gentry and the industrialists had more on their mind than soul saving or getting back to Eden. I don't know about in America at that time but certainly in England the clergyman role was not a vocation but the occupation that the third boy entered; the first born the heir to estate and the second the military. (I believe that's the order). I've never really suffered from humility so the effect on me is non-existent!

"Humble" before god. Yet this god loves you specifically, and created the whole world and the Universe for just mankind.

Versus seeing the scope of the Universe and realizing that we are an insignificantly small part of it, and the overwhelming majority of it has no indication we've ever existed at all, and likely never will.

The first is called humble, yet is pretty much the opposite.

Humility and humbleness (?) keeps one empathetic. When one is empathetic, one can understand problems and when one understands problems, there is a higher potential for effective solutions. That's the truth no matter what one's beliefs, or lack thereof are.

Humility has absolutely nothing to do with belief in an invisible friend in the sky. How much humility do you see in these Christian right wingnuts?

As I've never been a theist, I honestly can't answer this question. However, I hear people use the word humble to describe me regularly so it isn't a trait reserved for theism.