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Of course, if you're into music and you have the talent, you can do wonders to inspire others to change themselves.
One pair of hands won't do much by themselves. The mouth's words however, bring more pairs of hands.
Find your passion and speak, sing, whatever, inspire others to do something about it. That is how you'd optimally be able to help the world.
Music is just one of the best ways to reach out to others.