Piccione and Rubinstein (2007) have developed a ‘jungle model’. In contrast to standard general equilibrium models, the jungle model endows each agent with power. If someone has greater power, they can simply take stuff from those with less power. The resulting equilibrium has some nice properties, including that it exists, and that it is also Pareto efficient. — AI and the paperclip problem by Joshua Gans, 2018
2026-03-11 update: I added the source of the quotation above. The source PDF is freely available at Equilibrium in the Jungle by Michele Piccione and Ariel Rubinstein.