There are many different reasons why a person would dedicate their lives to peaceful endeavor. They may consider it a "life calling," they may feel strongly against a particular issue, or perhaps they simply have a strong desire to do humanitarian work.
Either way, this selfless behavior is to be commended and admired. Many individuals have made a huge and remarkable difference to the lives of others, and indeed to different nations. Take a look through to find out what these inspiring pacifists have done.