Answer:
Yes
Step-by-step explanation:
It is definitely true that leaders should work to harmonize their nations with all countries around the world as it is the only way to make society better and best in its own way.
The harmony around the world will work in a number of ways. The nation can transfer their military funds to hospitals and schools, they can also increase their foreign trade and exchange of resources with one another will be better.
Thus, it is necessary for ruler to maintain peace around the world.