No, it's not.
Check out who is in power when major genocides are perpetrated.
Socialists and/or Islamicists.
One of the most important and consistant characteristics of leftists is that they are unhappy people.
Here is a monogram by John Ray who studied the psycology of leftists during his academic career:
The Motivations of Political Legists
http://tongue-tied2.blogspot.com/2006/06/what-appears-below-is-attempt-to.html