Research shows that the world is getting more peaceful. A trend towards fewer and less lethal wars over time can be observed. The trend can be seen best when looking at interstate conflicts in the 20th century, which have decreased dramatically since the end of the Second World War.
More info from trustworthy sources:
One Earth Future on the question "Is the World Getting More Peaceful?", April 07, 2021
"War No More: Why the World Has Become More Peaceful", Review by Yale Professor Timothy Snyder of the book "The Better Angels of Our Nature: Why Violence Has Declined", 2011, by acclaimed psychologist Steven Pinker, in: Foreign Affairs, January 2012
BBC Science Focus on the above-mentioned book's contents, November 02, 2021
"The world has become more peaceful", Håvard Mokleiv Nygård, research director at the Peace Research Institute Oslo, in the award winning research magazine Apollon from the University of Oslo, February 15 2019