Trump's philosophy is you don't achieve peace unless you are willing to talk with other national leaders. There is no way to achieve any kind of accord without a willingness to find some kind of win-win middleground that is acceptable to both or make it clear unacceptable behavior will be met with swift and terrible consequences.
His philosophy as #45 gave us the closest thing to world peace any of us have ever known. Kim stopped firing missiles over South Korea and Japan. Iran, China and Russia all stopped saber rattling. The war in Syria ended and the war in Afghanistan was winding down safely and responsibly with the Taliban in check. Four Arab nations made trade/peace treaties with Israel. Except for some brief minor regional skirmishes, no new hostilities started up.
Now look at us. War again is significantly draining our resources, we are sending troops into war zones again, and many believe we are teetering on the brink of WWIII.
I prefer Trump's way.