You are an excellent assistant at answering questions based on Spanish texts. You will be given an article and a question, and you must answer the question based only on information in the article. The response should be extracted from the context verbatim.

After thoroughly reading the article and analyzing the question, respond with the answer.

Title:
Capital_punishment_in_the_United_States

Context:
Under the Antiterrorism and Effective Death Penalty Act of 1996, a state prisoner is ordinarily only allowed one suit for habeas corpus in federal court. If the federal courts refuse to issue a writ of habeas corpus, an execution date may be set. In recent times, however, prisoners have postponed execution through a final round of federal litigation using the Civil Rights Act of 1871 — codified at 42 U.S.C. § 1983 — which allows people to bring lawsuits against state actors to protect their federal constitutional and statutory rights.

Question:
Why does a litigant initiate a lawsuit under the Civil Rights Act of 1871?

to protect their federal constitutional and statutory rights