How did they make the world a better place?

He made the world a much better place by bringing Freedom back to South Africa.                                                                                                            He stood up for what he believed in, and led other people to feel the same about their worth as people.                                                                         He went to jail for 27 years.                                                                                                                                                                                                          Finally he changed the world for South Africa and also now they have a much better chance in life.