There have been numerous cases in the past where people conspired the chance of there being a third World War and it's never happened, but what are the chances of it happening in our lifetimes?
I think that with the rapid advancement of technology and countries readying up to go to Mars and beyond, something like the space race may happen again.
Imagine the amount of conflict that will arise when whichever country happens to colonize Mars first. People are going to fight for land like animals and this is why we should be prepared. I'm sure it's happening already, but if it's not, we need to start planning how we are going to colonize areas that we have not been to yet. Not to say it's happening soon, but I'm sure that by the year 2100, we will be on other planets.
The advance in technology could result in wars involving other things, such as advanced energy weapons and more powerful bombs. I doubt that ISIS will ever become powerful enough to start a war on a global conflict so let's put terrorism out of the equation and focus on countries fighting.
It seems that Russia and USA are still quite against each other, this is coming from a South African, watching it happen on the media. Europe and the Middle East seem to be having a little trouble with the Syrian refugees and all, but I doubt that's going to cause anything major. To sum it up, I doubt that any World War will happen soon, but when space becomes prime real estate and nobody cares about earth anymore, I definitely think there's going to be trouble. I could be wrong and I could be missing some things, so feel free to contradict my statements and give your input!
What do you think can happen and what will cause the next World War in your opinion?