The cost-benefit was not there. It was simply not worth it to take the necessary hard actions to reach a level of difference in preparedness on a group level. (

The cost-benefit was not there. It was simply not worth it to take the necessary hard actions to reach a level of difference in preparedness on a group level. (Basically it would mean that anyone who wanted to "protect themselves" would have to strategically move to one place, buy land, organize, coordinate, get politically active, etc. It's a long and costly project. Usually only sects and religions have the capacity to carry out things like this.)