How can supreme court decisions be overthrown?

Court decisions can be overturned by higher courts, with the highest being the Supreme Court. Once the Supreme Court has issued a ruling, it can only be overturned by another Supreme Court ruling if the court agrees to hear that case or a similar case again.

It is also possible for Congress to pass a law or constitutional amendment (with the help of the states, which must ratify any amendment), which can effectively overturn a Supreme Court decision by altering the law on which the decision was based.