...how particular philosophies exist in an out sized amount, relative the the larger population, in various industries. i.e. A Liberal bent in media and the arts, a conservative bent in law enforcement.

It's also exactly how system racism happens.

It's not necessarily about a high-level concerted effort to establish a particular organizational ethos. Mostly it's just about the gradual compounding of a million implicit biases. People lack objectivity, and are often resistant to the idea that they do.