Slaves made it possible for what to happen

Slaves did work for their owner, so it means that the owner could have free time and not have to do the work. because slavery in the us, ancestors of slaves are, sadly, not always accepted as the owners' ancestors are

The case was a u.s. supreme court decision that defined the scope of the u.s. congress's legislative power and how it relates to the powers of american state legislatures. the dispute in mcculloch involved the legality of the national bank and a tax that the state of maryland imposed on it.