I love this video so much. Lined up correctly, a SIM-sized domino can knock over a hundred-pounder.

It’s the perfect reminder of how great change happens in the world. All breakthroughs — self-driving cars, the civil rights movement, polio eradication —  are built from smaller changes that came before.

The same is true for any great personal change. Do you want to write a book, join a band, start a business? Do you want to change the world? Do you want to change your world by getting out of debt, improving your physical, mental, or emotional health, or strengthening a core relationship?

This video has a lesson for you: Ignore the 100-pound domino!

The chain reaction starts with that smallest one at the front. Nothing happens until that one’s knocked over, so what’s your smallest domino?

(via Kottke)