Bruss–Duerinckx theorem
The theorem of the envelopment of societies for resource-dependent populations, also called the Bruss–Duerinckx theorem, is a mathematical result on the behavior of populations that choose their society form according to only two hypotheses that they see as most "natural": Hypothesis 1 (H1): Individuals want to survive and see a future for their descendants. Hypothesis 2 (H2): The average individual prefers a higher standard of living to a lower one.