I have nothing but good things to say about "Hamilton" as a musical, but historically it takes certain liberties. Sadly, Hamilton's fraught relationship with slavery is one of things that's smoothed over for the sake of plot in "Hamilton."

As in the musical, Hamilton married Elizabeth Schuyler, the daughter of a wealthy and politically powerful family. It doesn't mention that the Schuylers were wealthy and politically powerful slaveholders. Like many powerful families, the Schuylers maintained a household staff of enslaved Africans. Slavery was outlawed in New York in 1799, but until then, Hamilton conducted transactions involving slaves on behalf of his extended family.

There are three separate financial records of Hamilton buying slaves for his own household. A 1784 cash book for a client reads "To a negro wench Peggy sold him." A 1796 cash book similarly records $250 paid to one N. Low for "2 Negro servants purchased by him for me." Finally, a 1797 ledger records the purchase of a "negro woman & child" from a Dr. John B Church for $225 and, a few weeks later, the purchase of another African woman for $90.

At the same time, Hamilton supported John Laurens' 1779 proposal to admit black soldiers into the Continental Army in exchange for their freedom. Hamilton also joined the New York Manumission Society in 1785, which was a moderate abolitionist organization focused on outlawing the slave trade and gradually phasing out slave labor.

So, did he own slaves? Yes. Was he actually against slavery? Most likely, but he didn't let it get in the way of his domestic comfort or social climbing. Was he an abolitionist? Sort of. He advocated against the "abuses of slavery" and thought slavery as an institution was bad and should end, but wanted it abolished gradually over the period of a few centuries. Make of that what you will.