Why is history important to politicians

In ohio in 1872, the cleveland massacre was a violent labor dispute at standard oil refineries in cleveland. a takeover by standard oil of the refineries in cleveland. an attempt to stop standard oil from becoming a monopoly. a failed attempt by standard oil to take over other refineries.

Which of the following was a major effect of paul's conversion to christianity? christianity became the official religion of the roman empire. the teachings of christianity were banned by pontius pilate. christians began to debate whether jesus was resurrected or not. the teachings of christianity were spread to non-jews called gentiles.

The information box says that the han added 4,000 miles of wall.refer to the mileage scale.how can this be true?