There is no instance of a nation benefitting from prolonged warfare.

Leibniz dedicated his life to efforts to educate people to understand that true happiness is found by locating their identity in benefitting mankind and their posterity.

Being rich is a good thing. Not just in the obvious sense of benefitting you and your family but in the broader sense. Profits are not a zero sum game. The more you make the more of a financial impact you can have.