Chelsea Clinton says she's naturally an optimist. So despite enduring name-calling from the time she was a child, it's partly why she chooses to answer insults — even on Twitter — with kindness and respect.

Clinton says those with a platform need to show others — particularly children — how to defend themselves against cyberbullying while maintaining their own humanity.

It's one of several messages in her new book, "Start Now! You Can Make a Difference." In it, Clinton encourages kids to make a positive change in the world.

Chelsea Clinton poses for a portrait on Tuesday, Oct. 2, 2018, in New York to promote her book, "Start Now!: You Can Make a Difference." (Photo by Taylor JewellInvisionAP)

Chelsea Clinton poses for a portrait on Tuesday, Oct. 2, 2018, in New York to promote her book, "Start Now!: You Can Make a Difference." (Photo by Taylor JewellInvisionAP)

In an interview with The Associated Press, Clinton talked about her inspiration for the book. She also talked about Supreme Court nominee Brett Kavanaugh's mention of her parents during a Capitol Hill hearing — and why it should disqualify him.

This image released by Philomel Books shows "Start Now!: You Can Make a Difference," by Chelsea Clinton. (Philomel Books via AP)

This image released by Philomel Books shows "Start Now!: You Can Make a Difference," by Chelsea Clinton. (Philomel Books via AP)