How does a culture become a civilization?

a culture becomes a civilization when more people join and practice the things (religion, beliefs, dress code, etc...) of the said culture

one of the negative side effects were the economic losses the events of september 11th caused. many, many people lost their jobs as a result of a downturn in the economy after the terrorist attacks.

the difference is that white collar worker performs skills like worker as a scientist or well blue collars do physical work and they do services like being a cook.