Of man and machine...

There are times when I wonder about the future and what will take place as far as "tinkering" with man. It's been the topic of many a science fiction type movie/book, where "unwanted" behaviors or characteristics are eliminated or enhanced in man just as easy as one would change auto performance parts for a machine. In some ways we have already done this when it comes to genetics, which created the never ending dilemma of how much in man could be changed without impacting what makes us unique, our human spirit...