That's great! Sadly, our constitution did not outlaw the extremely common practice of enslaving Black people until the 13th amendment, which was only ratified in 1865.
In the hundreds of years prior to that most everyone else in the country was allowed to acquire land, wealth and an education while the enslaved folks were legally blocked from doing the same. It took nearly another ~100 years for their right to vote to be marginally protected and to finally end legal segregation, that was less than one generation ago so you can imagine that the inequity here won't match that of every other country.
In the hundreds of years prior to that most everyone else in the country was allowed to acquire land, wealth and an education while the enslaved folks were legally blocked from doing the same. It took nearly another ~100 years for their right to vote to be marginally protected and to finally end legal segregation, that was less than one generation ago so you can imagine that the inequity here won't match that of every other country.