Is "war",the major cause of war crisis in the world?

Answer 1

Yes.

The small countries also fighting among themselves leaving development of the country aside.

Answer 2

Yes, war is a quarrel as they say but a big sized one with tanks planes moving everywhere killing each other, due to this reason most animals has reached near extinct and heavy pollution and the destruction of trees. for example in WWII, america used a nuclear missile againist Japan leading more than thousands of sick people and death, later that we are lucky that the war ended in the 19th century and we are in the 20th century, all we can hope is there is no such thing as WWIII in the future or the world will be facing an even bigger crisis than the WWII.

Answer 3

Yes.. You could say that