This is a thesis that even non-JWs have trouble with. The world is better than it has ever been before- by all measurable metrics. The problem is that 3 major opinion makers- policians, news media and religion all have a vested interest in us hearing about the worst of our world- the most devastating, the most macabre, the most terrifying.
The actual problem that we face now is that there are no diseases, natural disasters, wars, etc that regularly kull the human population- so we are in real danger of overpopulating!!