Perhaps they get discouraged by the sheer magnitude of the idea. After all, the world is a pretty big place. And the problems do seem insurmountable.
But what if we look closer to home. What if we don't think in terms of the whole wide world. What if instead we consider our own little world. Can we make a difference then? Can even the simplest seemingly insignificant act of kindness make a difference in the lives of others?
Meet Tinney Davidson, an elderly widow who waves and smiles at high school students every day as they walk by her house. And not just once a day. She waves and smiles from her front room window in the morning, at lunch time and then again after school in the afternoon.
And what's even more heartwarming is that the students wave and smile back at her. Genuinely.
At first, the students found it a bit weird. But then, because it was an everyday occurrence, they began to think of it as a "thing". Something you just did back. Something really nice that started and ended your school day.
Then on Valentine's Day, the students honoured Tinney Davidson with their own version of a smile and a wave. Check out the 2-minute video for yourself.
The next time you hear someone denigrate a young teenager. The next time someone says that kids today have no morals. Or they just don't seem to care. Send them a copy of the video above. It could make a difference in their lives.