Many people make the argument that war is sentimental in human nature. After all, lions are harming each other in unexplainable ways each day! Although, this can be disproved quickly.
Lions; for example, have war encoded into their genetics. If that lion over there tries to take your pride, you need to fight him off! They don't know what a peace treaty is, nor trading, or justice. All they know is it's kill and eat or starve, kill or die, kill or be driven out. They cannot grasp that there is something other than pure survival and passing on their genes. Humans, on the other hand, have all these things.
Humans trade goods and services using currencies. Those currencies can be traded for more goods and services. Doing so is much simpler than just taking those by force. Making weapons and armor is expensive, and, after all, land may be purchased. Although, goods and land are not the only reason for war.
Political and religious reasons for war are usually what most wars currently are about. These are also optional. In the case of politics, you may try to persuade one to be on your side. Although, there is an exception. If the person/people you are trying to persuade are doing outrageous acts of murder and cruelty (e.g. Adolf Hitler) they should not be forgiven. If one is causing unnecessary pain and suffering towards innocent beings, they should be stopped. In some cases, they cannot be persuaded.
Religious reasons for war are a tad bit similar. If you want to get people to join your religion, you must persuade them kindly. Using force and murder would only make them fear and hate you. There are people who cannot be persuaded. They should be left alone.
In conclusion, humans do not really need conflict. Why don't we just set our differences aside and give peace a chance? :)
I'm Iris. A 10 year old ('turned 11 last March 2018) who got lots of reflections and views on life as I experience it. I love to read topics about the world around us, other people's ideas and opinions, and just about anything that I'm curious about and interested in.