system
Given the following post, respond as if you're commenting on Reddit:
human
[Marvel DC] Why do Marvel heroes fight amongst themselves more than DC heroes do ?
gpt
The 2003/2004 “JLA/Avengers” crossover story does a beautiful job of showcasing the differences between the DC and Marvel worlds and their characters. It should be said that the art and writing of these four-issues hold up extraordinarily well to this day. The story is canon to both universes, with the aftermath of the crossover having played a role in a later DC event, as well as having been cited in the Official Handbook of the Marvel Universe.

We are shown that the Marvel earth is smaller with less urban development (no Gotham, no Metropolis, etc…) and that the speed force does not exist in the Marvel universe, yet other laws of physics do carry over. The Scarlet Witch can use the more powerful and, for lack of better term, *chaotic* Chaos Magic of the DC universe. Superman is still powered by the Marvel Earth’s sun.

“JLA/Avengers” makes the DC world out to be a semi-utopian world of sorts, in which heroes are icons and celebrities and are practically worshipped. The Avengers’ first observations of this world are the futuristic architecture and the massive billboards and screens which project the heroic feats of the DC superheroes.

On the other hand, the Marvel world is portrayed as far more dark and violent, where the heroes are never quite enough to protect everyone, and where people are quick to anger and to commit violent acts against mutants and other beings with powers. When Wally West first lands in the Marvel world, he is met by an angry mob chasing after a mutant boy. Wally himself is mistaken for a mutant, and had his vibrational frequency not corrected itself and brought him back home, he would have been killed.

These are the natures of their worlds. 

It is easy to get caught up in all of the classic superheroes in brightly-colored spandex suits, yet if you take a moment to really think about each universe, particularly in a more modern age, you realize just how different they are.

The DC universe is protected by the Justice League, the “super friends!” All of the old-school notions of superheroes hold true here.

The Marvel universe is home to super soldiers, assassins, and a mutant population who is hated by most others. In truth, there are very few traditional “super heroes” in the Marvel universe. Those that *do* fly around NYC in a bright costume, saving people out of the good of their heart, like Peter Parker, are distrusted and barraged by the media.

I imagine that anyone would be untrusting and on-edge in that world, which is so much more like our own.