First, a little bit of explanation for those unaware: Planescape was a setting for 2nd edition AD&D. It is, arguably, one of the most uniquely creative settings ever devised for a D20 system, but that's probably just my love of it and how weird it could get coming through. The important part right now is that it had the Factions - philosophical groups that struggled to manipulate the nature of the multiverse, because belief can alter reality for the Outer Planes.
When it was a new-ish setting and I was deep into it, of course I thought the louder and wilder ones were cool. You know how it is, right? But there was one faction that, these days, absolutely 100% speaks to my very heart - the ominously named Bleak Cabal. You'd expect them to be nihilists with that name, and to a degree they were, but what made them different is that, where everyone else is looking to enforce their philosophy on the multiverse and prove that it's the real truth, the Bleakers looked at everything and went, "Well, doesn't seem to be much of a point to any of this, does there? Hey, buddy, you look hungry, want some soup? And you, gentlefolk, I saw you sleeping in that alley, I've got a spare room you could set up kip in for a bit so you can stay dry."
The Bleakers looked at the multiverse, decided there's no grand meaning or ultimate purposes, and concluded that you should be kind. Everyone's going to be going through the worst of it sooner or later, and it's better to hold out a bowl of hot soup and a warm blanket when they do than it is to mock or belittle them. The world's on fire and in the trash bin, why make it any worse when you don't absolutely have to?
As an elder Millennial, I really like that. The world's on fire and filled with awful things, so why not be kind if you can?