Interesting question: indeed why would evolution select for genes that produce sterile individuals (for ants)? What is the selection pressure ensuring only the

Interesting question: indeed why would evolution select for genes that produce sterile individuals (for ants)? What is the selection pressure ensuring only the queen reproduces? Firstly, the drones creating offspring would lead firstly into a population explosion followed by a population collapse after viable and attainable nutrition sources nearby have been depleted. Once the population collapses to low enough numbers, even cannibalism does not work anymore and eventually that genetic line dies out. Also, it is presumable there would be fighting over resources, and maybe multiple genetic makeups within a single nest also opens up the door for attacks from other nests, since detecting who is a friend and who is not could be difficult, making the nest (and its genetic makeup) vulnerable. Also, the minimum reproductive unit for a mobile homo sapiens is obviously a man and a woman. But is it viable, too? I say yes. Their offspring can wander out away from their parents and find another isolated offspring that is fsr enough genetically, and create progeny and repeat the process. If the humans are somehow not mobile, then a larger group ("tribe") is needed to avoid inbreeding with its detrimental effects.