Notes:cultural diffusion, the spread of norms, values, knowledge, symbols, and material components from one society to another
This is how long it took each example of technology to reach 50 million users:
Radio: 38 years
Television: 13 years
Internet: 4 years
Facebook: 3.5 years
Angry Birds App: 35 days
Pokémon GO: 19 days
ultural lag, the process by which technological development and progress outpace current norms, values, knowledge, symbols, and material components of society