system
Given the following post, respond as if you're commenting on Reddit:
human
What social and economic changes made fast food companies (like McDonalds, Whataburger and Burger King) so successful?
gpt
A good place to start is the *McDonalization of Society* by George Ritzer. Currently in its 8th edition. The four main findings are predictability, calculability, efficiency, and control.

Whilst the book has McDonald's in the title, it not really about it, but applying these aspects to other businesses and society at large.