Pediatrician and philanthropist Melinda Gates, along with her husband Bill Gates who is a co-founder of Microsoft, have pledged to give away the majority of their wealth to medical research and helping poorer populations through their philanthropic foundation. They are currently the richest people in the world and are known for setting up large philanthropic funds and organizations to cure diseases and support medical research, initially focusing on eradicating polio and adding support for other issues over time.