Shifting Legal and Social Norms in Relationships
Legal and social recognition of relationships has changed over about a century. Click any event to read why it matters.
Legal milestone
Social / cultural shift
Comparative note
Relationship norms are historically situated, not fixed. Over roughly a century, U.S. law and social
custom around who may marry, and how relationships end, have shifted repeatedly. Click a marker above to see what
changed and why it shows these norms are shaped by their time and place.
United States focus with two international comparison points. Decade-range events are placed at a representative year and labeled accordingly.