Ever hear of the urban legends of knocking people out and stealing one of their kidneys? This would make it real. There's a whole bunch of science fiction based

Ever hear of the urban legends of knocking people out and stealing one of their kidneys? This would make it real. There's a whole bunch of science fiction based on this, Larry Niven coined the term organlegger: https://blog.oup.com/2008/02/organlegger/ https://blog.oup.com/2008/02/organlegger/