Who was going to lead New York out of the Union?

In December 1860, South Carolina became the first state to secede, but on January 7, 1861, New York City Mayor Fernando Wood suggested that the city follow suit. ... Wood suggested that New York become a “free city,” independent from both the North and South, in order to not lose business to seceding Southern states

Explanation:

There are or have been several movements regarding secession from the U.S. state of New York. Only one of them – the state of Vermont – succeeded. Among the unsuccessful ones, the most prominent included the proposed state of Long Island, consisting of everything on the island outside New York City; a state called Niagara, the western counties of New York state; the northern counties of New York state called Upstate New York; making the city of New York a state; a proposal for a new Peconic County on eastern Long Island; and for the borough of Staten Island to secede from New York City.

i believe it would influence their own way of understanding things. it shall be a foundation where they can draw or start an argument.   historians are also  scientists that  have their tools of analysis and expertise to unlock a variety of difficulties such as relationships of man, origin, politics, economy, and culture. based on facts and understanding on these areas, they may shade light to extract ideas and develop options to validate a hypothesis or debunk it.