Concept
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Created by Boundless
The Movement for Gay and Lesbian Civil Rights

Anti-sodomy laws in the United States
This map depicts when anti-sodomy laws that criminalized non-heterosexual sex were overturned by state in the United States.
Source
Boundless vets and curates high-quality, openly licensed content from around the Internet. This particular resource used the following sources:
"Map of US sodomy laws."
http://en.wikipedia.org/wiki/File:Map_of_US_sodomy_laws.svg
Wikipedia
CC BY-SA.