The progressive party was successful in getting congress to pass and the states to ratify the seventeenth amendment on april 8, 1913, which allowed for the direct election of u.s. senators by the voters themselves, substituting Article I, Section 3, Clauses 1 and 2 of the constitution, in which the Senate was elected by the State Legislatures.
We still think that direct exposure to filth/decay can give us diseases and it’s probably true.
The Qin dynasty built the Great Wall of China