Answer: the scientific method
Explanation:
One of the biggest contributions made by Aristotle was the way in which he researched an issue. His advice to study books/research done on topics, to perform independent studies, and to gain a sense of the general consensus on a topic are the foundation of what would later become the scientific method.
<span>The Slaughterhouse Cases, resolved by the U.S. Supreme Court in 1873, ruled
that a citizen's "privileges and immunities," as protected by the
Constitution's Fourteenth Amendment against the states, were limited to
those spelled out in the Constitution and did not include many rights
given by the individual states.</span>
