i thank all of you for comments.
i would just say that since the causes of the previous wars are written under the separet heading,therefore they seem very detailed ,albeit they are not..so far as current situation is concerned ,it has duly been discussed. Howevr, certain points that were suggested by mumtaz hayat are superb.i do acknowlege that the points of how can the 3ww be avoided should have been more detailed.About introduction, it is well written and rules of essay writing are fully observed in it.
The essays is open to all for comments.