How has human deveopment changed over the last two centuries?

Areal estate salesperson is often approached by home buyers of a particular race. his usual practice is to show them homes in neighborhoods where most of the residents are the same race as the buyers. he avoids showing these buyers properties in integrated areas. this is called:

President franklin roosevelt most likely supported lawrence camp in the senate race against walter george and eugenes homage in 1938 because he

Rank the following from most to least devasting: ordovician,permaian,cretaceous, pleistocene