Science

Having a handicapped younger brother, I've been exposed to many different ailments (both physical and mental).  I've seen and shared in a young child's joy when he had a new prosthetic limb so he could play soccer once again.  I've met a man who, after receiving an artificial heart a few years ago, was able to live long enough afterwards to meet his newborn grandson.

Experiencing these things brought me a deep fascination and longing to immerse myself in the future biomedical engineering.  It is the reason why I chose to choose my college major, and it plays a major factor in my decision to go to medical school.  I have experienced no greater joy than to share in another's chance at a normal life through the use of technology.

But then there's the other side of the spectrum.

Science and technology are neutral.  It is through the application of scientific knowledge does the trajectory of humanity's future point.  Einstein's E=mc^2 has been fundamental in both bringing energy to millions of people, and has also been responsible for the decimation of an entire race through the atom bomb.

Despite this movie being complete fiction (and a promo for a video game no less), it was an utterly sobering reminder of this fact.  As dramatic as the movie is, this sort of future is not an impossibility.  And I am deeply frightened.