Peter Singer is a philosopher and writer who thinks about society and how people can help each other. He believes that we all have a responsibility to help those in need, even if we aren't close to them. He recommends that people give away some of their money to those who are less fortunate, and use their voice to speak up for those who don't have one. He also suggests that people can make a difference by supporting companies and governments that are trying to do good in the world.