Those questions have been explored thousands of times in SF, especially since Gibson introduced the Dixie Flatline in Neuromancer back in the mid 80s.

I understand this reference.

I read the novel then, totally forget what it was about.

So you are generally forgetful, ay?

About novels I have read once, 22 years ago, yes, generally

Where's the variation?

I was in a hurry. I'll be sure to vary according to subject matter in the future.

The language and ideas of imperialism is the language and ideas of 19th century England.

They viewed the world as a battleground, between the forces of piety, a God on the side of technology, art, progress, and compassion ... vs. the dark savagery and endless misery they encountered on so many fronts - slavery, poverty, "fallen women", and of course the native populations of N. America and Africa.

Imperialism was endorsed by the same intelligent, enlightened, and compassionate English and American elite who also labored for the end of slavery or volunteered countless hours in charity work to help the poor. It was a means to a better, more Christian world.

That's imperialism - they all believe in it fully, but they don't like it up 'em.