Terry Pratchett is one of my favorite authors. A few years back he was diagnosed with a rare form of early onset Alzheimer's disease, and has since become a passionate advocate of what he calls "assisted death." One of the biggest problems with our healthcare system, both morally and financially, is our inability to face the end of life courageously. To be able to choose when and how to die, to forestall what is in many cases completely pointless treatment, that is what he's talking about.
This is worth watching in full:
If you've got the time.
UPDATE: I can't recommend the second one there highly enough. One of the best documentaries I've ever seen.