what are the reasons why human being should promote peace at national and global level?
Peace is not merely the absence of war and hatred (negative peace / cold war) but also the presence of cooperation, compassion and worldwide justice. The means we use to reach our ends are extremely important. [ Hopefully your "means" are kindness-centered and non-destructive. Often (possibly always) being kind is more important than proving you are right. When it is critical that you prove
your point, remember to intertwine wisdom with compassion. Recent events would suggest that the human race is starting to learn that change can be achieved more effectively by mass demonstrations and peaceful means than by negative, destructive and hateful means. ]
There are no new answers.