We can't feed billions of people from greenhouses. Humans doesn't work like in a videogame, where "all tribes have united to build a starship!..". If our crops

We can't feed billions of people from greenhouses. Humans doesn't work like in a videogame, where "all tribes have united to build a starship!..". If our crops will start to fail we won't start building tech. Will start war(s). Big ones, to simply take whatever other countries have. Think "migrants - bad" bogeyman but x100 and you are starving now.