Well, if all but .1% of the world's men were sterilized that still leaves about 3,400,000 fertile men world wide going by today's numbers. That is more then enough for a healthy genetic base. And it's not like the other men are dead, so society is getting a stabilizing influence if an artificial one.<br/><br/>So I'm thinking preventing the collapse of civilization is most certainly possible if cards care played right, bringing in more automation into food production for example. If we're careful I can see social progress stopping, but civilization could linger.<br/><br/>Also, wouldn't you grab on to any chance there was for humanity to continue- no matter how improbable?