Europe. North America and Africa
They were hindered by economic development and lack of enforcement, so I'd say 1. Cost, because no one would pay for it.
Answer:
A command economy is a system where the government, rather than the free market, determines what goods should be produced, how much should be produced and the price at which the goods are offered for sale. The command economy is a key feature of any communist society
It was primarily the development of agriculture that led to the development of the first city states, since this allowed for there to be a surplus of food, which allowed people to have labor specialization.
Answer:
1854,1855
This was part of bleeding kansas.