The government supplies public goods because the market cannot decide who should receive them the government restricts them to those who can pay for them the economy does not have the resources to provide them individuals have no motivation for profit to produce them

the economy does not have the resources to provide them.

the completion of the erie canal spurred the first great westward movement of american settlers, gave access to the rich land and resources west of the appalachians and made new york the preeminent commercial city in the united states.

cultural/diplomatic relations. most medieval japanese   culture has chinese origins. writing, architecture etc.