This is still good advice

There is no panacea for peace that can be written out in a formula like a doctor’s prescription. But one can set down a series of practical points—elementary principles drawn from the sum of human experience in all times. Study war and learn from its history. Keep strong, if possible. In any case, keep cool. Have unlimited patience. Never corner an opponent and always assist him to save his face. Put yourself in his shoes—so as to see things through his eyes. Avoid self-righteousness like the devil—nothing is so self-blinding. Cure yourself of two commonly fatal delusions—the idea of victory and the idea that war cannot be limited
B H Liddell-Hart, Deterent or Defense (1960)

Related:

The Thucydides trap and the Korean conundrum