Movie Memorabilia

What movies from the past 10yrs show how people can regress back into savages in dire situations?

I’m thinking of movies along the lines of “The Mist” in how the people trapped in the grocery store turn against each other and certain people try to take charge. What other recent movies show that, in drastic circumstances, humans can regress from civility and turn into savages in order to survive. The book “Lord of the Flies” is a good example, but can anyone think of any recent movies? I feel like there is a big one that I just can’t remember.

Three different adaptations of H.G. Welles ‘Island of Doctor Moreau’ and two ‘Lord of the Flies’ movies.