In this fourth episode, we introduce 4 ideas about leaving no one behind in society, in terms of poverty, education and welfare. A pastor who's been helping the homeless for over 30 years has plans in the works to make an even bigger impact. An art studio where people with disabilities can let their talent flourish. E-learning that provides equal opportunities for children around the world, and a traveling salon that provides hairstyling services and improved quality of life for the elderly.