1791
Bill of Rights (1-10)
First ten amendments establishing fundamental rights including speech, religion, and due process.
1804
12th Amendment
Modified presidential election procedures.
1865
13th Amendment
Abolished slavery and involuntary servitude.
1868
14th Amendment
Guaranteed citizenship rights and equal protection under law.
1870
15th Amendment
Prohibited denial of voting rights based on race.
1913
16th Amendment
Established federal income tax.
1920
19th Amendment
Granted women's right to vote.
1933
21st Amendment
Repealed Prohibition.
1964
24th Amendment
Prohibited poll taxes in federal elections.
1971
26th Amendment
Set voting age to 18.