You know, mankind has brought about so many wonders of science throughout history.
First it was the club, then the flint knife, followed by the bronze sword, followed by the iron sword followed by the steel sword.
The spear gave way to the bow, which gave way to the cross bow which was followed by the matchlock, then the flintlock, then the cap and ball, then the cartridge weapon, after that came the machine guns...
hand throwing stones gave way to siege engines, catapults etc. which were followed with cannons.
Then in this century, humans came up with all kinds of new ways to kill people, poison gas, land mines, nukes, high yeild explosives, smart bombs etc.
Now, have you ever wondered just what humans are thinking? With the total money spent by every nation on military arms in the twentieth century, mankind could have ended hunger and poverty, made advances in health research and other great things.
In fact, if the every dollar that was spent on the Vietnam war had been used by NASA, everything portrayed in the movie 2001 a space odyssy would have been built and in use by the 1980's.
We would have permanate space stations, a working base on the moon, that was self supporting, mining colonies in the asteroid belt, a beginning colony on Mars by now.
Fossil fuels would have been abandoned as the more efficient fuel cells developed for NASA became cost effective for everyone on the planet.
And today, humans would be preparing for the next big step in exploration, finding a way to travel between the stars, and we would have be getting ready to send probes to find new worlds.
Polution would be a thing for history books, the only major diseases that would be around would be those that have followed humans throughout history, the degenerative diseases, like arthritis etc.
But clearly, as a race, our priorities lie in finding ways to destroy each other. When it is all said and done, there wont be enough people left to fill up a baseball stadium. Humans will fall onto the trash heap of the universe, and if there are any intelligent beings out there, when they show up here and find what is left, they wont be impressed.
