For the last 65 years they have been breeding nicer Pitbulls....They are called American Staffordshire Terriers. Pitbulls are terrible "Guard" dogs,(They are just to human friendly) that was never their purpose. If someone is looking for a Guard dog (Which I think is a bad idea to begin with) there are a ton of breeds that have been bred for this type of work. (ie Rotts, Dobs, GSDs...) I agree completely with this quote. I firmly believe in Nuture over Nature!! Dogs will have a tendency for Dominance but you can channel that away from aggression. People really need to take responsibility for their dogs behavior.