difference, especially in social orders

wealth and poverty

a land, a large place / a country in general, a region / a country as in a nation, a state / the office of emperor, the crown; affairs of state / a province of ancient Japan

to spread, to extend

wealth inequality

countries

a land, a large place / a country in general, a region / a country as in a nation, a state

national / country

Thailand (a country in Southeast Asia)

republic (country)