Ditto to all of this. I am an optimist, and I wouldn't want to live in any other time period. If this was 115 years ago most of us over 34 would be dead. I no longer worry about every war or economic downturn leading to Armageddon, which is really a pessimistic negative way of looking at life. I belileve the world will continue to improve; the air and water we breathe and drink is cleaner than it was 50 years ago and getting cleaner each year. Even the third world is improving and more improvement is on the horizon.
Hydrogen powered and electric cars are nearing a reality, which will likely change the world drastically - for the better no doubt. Medicine and science continue to advance, improving quality and length of life.
I could go on and on. But I won't for now.