The development of commercial radio broadcasts along with a wider circulation of newspapers and magazines in the 1920s really to

shortages of fertile land and farm equipment

growth of organized crime

the development of a popular culture and mass advertising

fewer employment opportunities

the hyksos invasion. the hyksos were able to attack egypt successfully because of their skills in using bronze weapons, composite bows and the use of the horse and chariot during the invasion. although the egyptians depict a barbarian-type overthrow, the truth is the seizure was likely a relatively peaceful one.