1. According to the author what was the greatest mistake mankind ever made?

The us is not democratic (facts/data/information/reason to prove the us is undemocratic)

Facial shaving brushes are either bulb-shaped or fan-shaped. an experiment is to be conducted to determine whether the lather thickness is the same for both types of shaving brushes. in previous studies, it was determined that shaving brush size (small, medium, large) is associated with lather thickness, but shaving brush type (wolf whiskers, maggard razors, frank shaving, and so on) is not associated with lather thickness. how could the experiment best be conducted? by blocking on shaving brush size by blocking on shaving brush type by blocking on shaving brush shape by blocking on lather thickness without blocking

Savings are transferred to businesses for investment through a) banks and financial institutions b) the federal government c) major corporations d) consumer purchases e) state and local governments