Paragraph Formation - Section 7

Rearrange the following five sentences in proper sequence to form a meaningful paragraph, then answer the questions given below.

1. The history of mankind is full of such fightings between communities, nations and people.
2. From the primitive weapon of warfare, man has advanced to the modern nuclear weapons.
3. Ever since the dawn of civilisation man has been fighting with man.
4. A modern war is scientific in character, but the effect is the same wiping human existence out of this earth.
5. The only difference now seems to be in the efficiency of the instruments used for killing each other.