What effect did advancements in robotics have on the economy

What is zinn's approach to the study of history? what does he suggest occurs when history is told is the story of human progress?

What impact did company towns have on working conditions? company towns were ideal places to live because of the cheap prices of company stores. entertainment value in company towns made them attractions for those in rural areas. education provided by company towns workers to progress in the company. conditions in some towns indebted workers to trap them in the labor system.

What features of the electoral system support the existence of a two party system and analyze one of these features and explain its role