wars are good way to end conflicts between countries. then present your arguments to your class  

We recommend you to develop such answers using your own ideas. However, you may consider the following points:

Wars are not a good way to end conflicts between countries 

- it is not correct to wage wars in order to resolve conflicts

- Wars should be banned and peaceful ways should be adapted to resolve conflicts

- Wars hinder the progress and prosperity of a nation

- Lead to heavy loss of lives of common man as well as resources

- Wars disturb the economical development of a nation as well

- No war is fought to bring peace or change in the society

- Few drastic after-effects of wars: still born children, lack of hygienic food and water, pollution, etc.

- Unethical environment due to illegal ways adopted by people to procure weapons, arms, etc.