Life expectancy is higher than it's ever been, we make more money, eat more food, have incredible technology at our fingertips. The industrial revolution only happened a few hundred years ago, racism and discrimination are almost gone from the world, medical science has made leaps and bounds. There's generally no place in the world that is worse than it was 50 years ago.
We have our problems such as overpopulation, overconsumption and the threat of nuclear war, but if we manage to overcome this, then things can only get better. That, to me, is reassuring.