Nothing good about war!

Personally, I think that war is not a good thing at all! We are one human family, homo sapiens sapiens, and we should not kill each other like spiteful microbiomes of bacteria! We're not lions, who kill each other to survive, we are humans who have persuasion and trading, we don't need to take goods or spread ideas by force! If humans are supposed to be so smart, why are we using war instead of peaceful methods anyways? 
   Many countries spend lots of money on producing weapons and explosives instead of... oh, I don't know, ACTUALLY HELPING THEIR CITIZENS? Why don't world leaders who were voted by their people to make their country better try to fund medical research, scientific innovations, making food cheaper and available, or lifting people out of the poverty line? Heck, some war-torn COUNTRIES have 80% OF THEIR POPULATION IN POVERTY! HOW CAN FELLOW HUMAN BEINGS JUST LET THIS SLIDE? WE NEED TO WORK TOGETHER TO MAKE COUNTRIES LIKE THOSE BETTER FOR PEOPLE TO LIVE IN! AFTER ALL, WOULDN'T IT BE BETTER FOR THE COUNTRY AS A WHOLE TO HAVE HEALTHY, EDUCATED PEOPLE INSTEAD OF DYING, STARVING CITIZENS? :(
    Oh, it controls the population you say? Well, that's false! In the past, deaths were common. Disease and starvation were killing people left and right. Birth rates went up to make sure AT LEAST one child survived to adulthood. But as places modernized and sanitation became safer, fewer people were dying. Guess what happened next? Birth rates went out the roof! The population was shooting high, but slowly birth rates started to go back down. Triplets and twins were rarer. Soon, the population will be completely stable. The population will control itself! Even if it couldn't, that's still no reason to make people suffer and die. That is just a cruel thing to do! With that in mind, humans should stop killing each other and start helping each other.
    If we are all human beings living in the same home, planet earth, why can't we just get along? Why can't we just put our differences aside and just love each other for who we are? Why do we cause suffering to each other for no reason? We all should just give peace a chance. It would make the lives better for everyone. (  ◕ヮ◕) ♡♡♡♡♡♡♡♡