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Index/Topics/Boos v. Berry

Boos v. Berry

A court case in which the Supreme Court held that a treaty-based obligation could not justify legislation that violated the First Amendment.

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Jan 27, 2026
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How have U.S. Supreme Court opinions cited founding-era treaties or non-constitutional texts when interpreting the First Amendment?

The Supreme Court has sometimes invoked Founding‑era materials — including treaties, founding-era writings, and early practice — when construing the , but it does so selectively and within tight metho...