If I could go back in time to stop WWI and WWII from happening, there are two possible ways things could go. One way is that more countries would be at peace with one another. The other way is that we would be more at war with one another. The reason why either of these could go is, because WWI and WWII taught us what disaster is really like and what we don't want to happen again. However, if it didn't happen, more countries might not want to go to war because they never experienced that pain and doesn't have a mean for vengeance.
