[steenreem]

I think that considering Amazon, a company with independent business units in completely different business (retail and cloud computing) as an entity with a single personality is about as accurate as thinking everyone from the same country has the same personality.

It's not as if the small group of people at the top determine everything else about the company: they only hire the people directly below them, and their influence decreases the further down you go. I think the larger determinant of a company is the business it is in, since that determines at large what people the company is attractive to and which it tries to hire.