Meaning of life = Having as much fun as possible on your way to a slow painful death. Wait whoops you meant overall meaning. So I think the overall meaning of life would be to live it out a gain as much knowledge along the way as possible. For knowledge is one thing that can be passed down to the next generation, and threw that each generation gains more. But I'm not referring to like book smarts, I'm going even broader. I find that knowledge comes with every event that you go threw in your life; be it someone close to you passing away to learn how important life truly is, finding what you want to do with your life threw school or other means, traveling the world to learn the diversity of life and situations in it, looking for a companion to live threw everything happening around you together, or just making friends in all areas to see how different each persons cards get handed to them as they progress threw life. Greed and war has taken over many people due to narrow sight and having little or no acception of diversity. We have always had it, threw-out history it repeats the scheme of someone becoming power hungry and wanting everyone to live by there standards and every time as you can see in todays society they lost in the long run. Life you could say truly has no meaning accept to live it, but you also can say it has any meaning in the world. The meaning of life varies not only by perspective of the person but by the changes threw-out that persons life. There will be always more then one meaning of life since not everyone walks down the same path in life. Some will say immortality is the meaning of life, others will say it is living it to the fullest, you even will have the people that will say learning from it is the most important and passing that knowledge on. What we may never know is which person there is right or wrong, that is the glorious thing about life, you have so many things you can do, so many things to see and figure out, and everyone will take a different path to the finish line. Trying to find the meaning to life is just like trying to decide what happens in the afterlife, the answers are limitless and to find the right one is almost infinitely impossible.
Greed and war move the world forward and pushes one persons ideal on others due to them thinking that ideal is the best. It doesn't make the world go round, it just keeps life that much more interesting trying to find out what happens next.