If you want to change others, you have to start a religion or a
  cause of some kind. Even then, people don't generally change on
  a deep level unless they desire it to begin with. Cliche? Sure.
  But cliche 'cause it's true smile emoticon

  That being said, you _can_ change yourself. THAT'S the only
  thing you have a chance of changing.

  If you change yourself, the change radiates out in your every
  actions, word, deed, thought.

  THAT changes things... automatically - just by being here, being
  who you are, doing what you do.

  Forget about the rest of 'em. Expecting/hoping others to change
  will drive you batty and make you unhappy. Maybe they will.
  Maybe they won't. But if YOU change... well, that's all that
  matters isn't? If you have the right attitude, outlook, etc on
  life, and approach every situation with all the change you wish
  to see, then you will see the change you wish to happen because
  it's no longer a "someday'; the change is in you, of you, IS
  you.

  It brightens up the world completely.