An organ transplant is the moving of an organ from one body to another, or from a donor site on the patient's own body, for the purpose of replacing the recipient's damaged or absent organ.
Most religions believe in organ donation, including the Jehovas who leave it up to individual members as to whether they donate or not. Some religions consider it completely unacceptable, and others,...
http://www.wellcomecollection.org/whats-on/events/in-or-out/transplant-timeline.aspx Timeline. They've been around for years - not discovered by 'one' sole person.
Organ transplantion in itself is not exploiting the poor. But often poor people will try and sell a kidney because they need the money. Also rich people will travel to poor countries such as India...