Which system of units is used by only a small number of countries in the world, including the U. S.?

sorry

i do knot know this

a countries leader should be motivated by the common good of the country.

populist movement, in u.s. history, politically oriented coalition of agrarian reformers in the middle west and south that advocated a wide range of economic and political legislation in the late 19th century. thus in 1892 their leaders organized the populist, or people's, party, and the farmers' alliances melted away.