What is the length of a term of office for members of
the United States Senate?

A senator's term of office is six years

Explanation:

Senators are elected to six-year terms, and every two years the members of one class--approximately one-third of the senators--face election or reelection.

i think it was because of how protected egyptian civilization was was which allowed them to evolve without much outside influence.

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.