system
Given the following post, respond as if you're commenting on Reddit:
human
[Star Wars] Would a Sith ever do something that doesn't benefit him personally but the Sith order or community as a whole?

I think the general idea is that Sith are selfish. So is there any bond among them beyond how it benefits them?
gpt
Think of it like a Jedi in reverse. The sith are still human (or whatnot) and try to stick to their principles, but human urges infringe. True dedication to selfishness would actually be fairly hard for humans unless they are sociopaths. 

A Jedi might commit a minor sin of selfishness from time to time, but strives to rise above it. A sith might give in to compassion or moral qualms, but strives to sink below them.