I read that Time magazine thinks Dr Vikram Patel who heads the NGO Sangath in Goa is one of the 100 most influential persons in the world. http://timesofindia.indiatimes.com/city/goa/Right-to-health-is-as-vital-as-right-to-food/articleshow/47668428.cms
Although I don't often think much of Time's opinions the Ted talk below gives an idea of why he is highly regarded. Here in this talk http://www.ted.com/talks/vikram_patel_mental_health_for_all_by_involving_alll