Much Like John McCain, GW was pressed into service, not on his own merit, but on that of his relatives, relationships, and/or birthright. I hate to say it, but much of our gub works via this principle. We criticize the Brits for having a "royal hierarchy", but guess what folks? We are not far off the mark. In any case, political intelligence is not a DNA or inherited trait (assuming the forefather even had any merit of his own to begin with???), it is more a random event of social science awareness; i.e., a visionary who can see a bigger picture of mankind. Arguably, we have probably as many bad ones as good ones - the luck of the draw.
I consider myself to be a pretty good judge of character as I'm sure many of you are. It's the kind of thing where, after meeting someone for 5 minutes, you have a gut feel for whether this is the kind of person you'd like to hang out with, or not. After hearing a few of GW's speeches in 1999, I had made up my mind.
Here is one of GW's former Professors at Harvard...
http://www.salon.com/2004/09/16/tsurumi/