The Founding Era (1776–1800)
The Constitution of 1787 embedded slavery into the legal order of the new republic through three provisions. The Three-Fifths Clause (Art. I, §2, cl. 3) counted enslaved persons as three-fifths of a person for apportioning congressional representation and taxation. The Slave Trade Clause (Art. I, §9, cl. 1) prohibited Congress from abolishing the international slave trade before 1808. The Fugitive Slave Clause (Art. IV, §2, cl. 3) required that escaped enslaved persons be returned to their enslavers even if they had reached free territory.
Voting was, at independence, restricted in most states to white male property owners. Women, enslaved persons, free Black Americans (in most states), and those without property were excluded from participation in the democratic process the revolution had claimed to establish.
The first Naturalization Act limited citizenship to "free white persons." This racial qualification for naturalised citizenship was not fully removed until the McCarran–Walter Act of 1952 — 162 years later.
Library of Congress — Statutes at Large →The Alien and Sedition Acts of 1798 criminalised political dissent. The Sedition Act (1 Stat. 596) made it a federal offence to publish "false, scandalous and malicious writing" against the government or its officers. Congressman Matthew Lyon (Vermont) was imprisoned under the Act for publishing criticism of President Adams — while still serving as an elected member of Congress.
Antebellum America (1800–1865)
The antebellum period saw the legal consolidation of slavery, the forced removal of Indigenous peoples, and the Supreme Court's ruling that Black Americans — whether enslaved or free — possessed no constitutional rights whatsoever.
The Indian Removal Act of 1830 (4 Stat. 411) authorised President Jackson to negotiate treaties with Indigenous nations for their removal from lands east of the Mississippi in exchange for lands to the west. The forced relocation of the Cherokee in 1838–1839 — known as the Trail of Tears — resulted in the deaths of approximately 4,000 of the 16,000 people forcibly marched, according to contemporary military records and Cherokee Nation documentation.
"[The Black American] had no rights which the white man was bound to respect; and that the negro might justly and lawfully be reduced to slavery for his benefit." — Chief Justice Roger Taney, Dred Scott v. Sandford, 60 U.S. 393 (1857)
The Dred Scott decision held that Congress had never had the authority to prohibit slavery in the territories, rendering the Missouri Compromise unconstitutional. It also held that Black Americans — free or enslaved — were not and could never be citizens of the United States. This remained the law of the land until the Fourteenth Amendment was ratified in 1868.
Reconstruction and Its Dismantling (1865–1900)
The Thirteenth, Fourteenth, and Fifteenth Amendments formally abolished slavery, granted birthright citizenship, and extended voting rights to Black men. The period of Reconstruction (1865–1877) saw Black Americans elected to Congress and state legislatures across the South. The Compromise of 1877 ended this experiment.
Southern states immediately enacted Black Codes after the Civil War. Mississippi's code (November 1865) prohibited Black residents from renting agricultural land except in towns, required annual written labour contracts, and criminalised vagrancy so broadly that those convicted could be hired out to private employers — a system known as convict leasing that persisted into the twentieth century.
The Chinese Exclusion Act of 1882 (22 Stat. 58) suspended the immigration of Chinese labourers, barred Chinese residents from naturalised citizenship, and marked the first time the United States barred immigration on the basis of national origin. It was extended repeatedly and made permanent in 1902 before being repealed in 1943.
Plessy v. Ferguson (163 U.S. 537, 1896) provided the constitutional framework for racial apartheid in the United States for nearly six decades. The case arose when Homer Plessy — who was one-eighth Black — was arrested for sitting in a whites-only rail car in Louisiana. The Supreme Court ruled 7-1 that "separate but equal" facilities satisfied the Equal Protection Clause of the Fourteenth Amendment.
War, Fear, and Exclusion (1900–1945)
World War I produced the most sweeping suppression of political dissent since the Sedition Act of 1798. The Espionage Act of 1917 and Sedition Act of 1918 resulted in the prosecution of over 2,000 people for speech and publication. Eugene V. Debs, who received nearly a million votes as Socialist candidate for president in 1912, was sentenced to ten years in prison for an anti-war speech. The Supreme Court unanimously upheld the convictions in Schenck v. United States (249 U.S. 47, 1919) and Debs v. United States (249 U.S. 211, 1919).
The Palmer Raids of 1919–1920 saw U.S. Attorney General A. Mitchell Palmer authorise the mass arrest of approximately 10,000 people suspected of radical political sympathies, with approximately 500 deported without individualised due process review. The Immigration Act of 1924 imposed national-origin quotas explicitly designed — in the words of its House sponsor Albert Johnson — to preserve "the racial composition of the American people."
President Roosevelt's order authorising the forced removal of Japanese Americans. Approximately 120,000 people — two-thirds U.S. citizens — were incarcerated without charge or trial. The U.S. formally apologised and paid reparations under the Civil Liberties Act of 1988 (102 Stat. 903).
National Archives →Cold War Suppression (1945–1975)
The Federal Bureau of Investigation's Counter Intelligence Program (COINTELPRO), active from 1956 to 1971, targeted organisations including the Southern Christian Leadership Conference (led by Martin Luther King Jr.), the Black Panther Party, the American Indian Movement, the Socialist Workers Party, and anti-Vietnam War groups. Tactics documented by the 1975 Church Committee included anonymous letters designed to provoke conflict between organisations, fabricated evidence, infiltration by paid informants, and what the Committee characterised as FBI collaboration in the deaths of activists.
"Many of the techniques used [by COINTELPRO] would be intolerable in a democratic society even if all of the targets had been involved in violent activity, but COINTELPRO went far beyond that." — Senate Select Committee on Intelligence, Final Report, Book III (1976)
Sixteen states still criminalised interracial marriage when the Supreme Court struck down Virginia's Racial Integrity Act in Loving v. Virginia (388 U.S. 1, 1967). Richard and Mildred Loving had been convicted in 1958 and sentenced to one year in prison, suspended on condition they leave Virginia for 25 years.
The federal government's active discrimination against gay and lesbian employees — the "Lavender Scare" — was formalised in Executive Order 10450 (1953), which identified "sexual perversion" as a security risk and provided the legal basis for the dismissal of an estimated 5,000 federal employees. The policy was enforced by the Civil Service Commission and documented in its annual reports.
War on Drugs and Surveillance (1975–2001)
The Sentencing Reform Act of 1984 and the Anti-Drug Abuse Act of 1986 established mandatory minimum sentences that the U.S. Sentencing Commission, in multiple reports to Congress, documented as producing racially disparate outcomes. The 100:1 crack/powder cocaine sentencing ratio was the most documented example: identical quantities of the same drug, processed differently, produced dramatically different sentences correlated with the race of typical users.
The U.S. incarcerated population grew from approximately 500,000 in 1980 to over 2 million by 2000, the highest rate of incarceration in the world. The Bureau of Justice Statistics documented that Black Americans were incarcerated at a rate approximately 5-7 times that of white Americans throughout this period.
The Antiterrorism and Effective Death Penalty Act of 1996 (AEDPA) imposed strict procedural barriers on habeas corpus petitions, limiting the ability of state prisoners to seek federal court review of constitutional claims. The American Bar Association's Death Penalty Moratorium Project documented cases in which the AEDPA's restrictions prevented courts from considering evidence of wrongful conviction.
Post-9/11 and Contemporary (2001–Present)
The USA PATRIOT Act (Pub. L. 107-56, 2001) passed the Senate 98-1 and the House 357-66 within six weeks of the September 11 attacks. Section 215 authorised the collection of "any tangible things" relevant to terrorism investigations — authority the NSA used to collect the telephone metadata records of virtually every American. The Privacy and Civil Liberties Oversight Board's 2014 report concluded this programme "lacks a viable legal foundation" and that "we have not identified a single instance involving a threat to the United States in which the program made a concrete difference."
The National Defense Authorization Act for Fiscal Year 2012 (Section 1021) authorised the President to detain persons, including U.S. citizens, in military custody indefinitely without charge or trial on a determination that they were "associated" with al-Qaeda or the Taliban. Federal District Judge Katherine Forrest issued a preliminary injunction against the provision, finding it "constitutionally infirm" (Hedges v. Obama, S.D.N.Y., 2012), though this was later reversed on standing grounds by the Second Circuit.
Following Shelby County v. Holder (570 U.S. 529, 2013), which invalidated the Voting Rights Act's preclearance formula, the Brennan Center for Justice documented the introduction of new voting restrictions in 25 states, including strict photo ID requirements, reductions in early voting, and purges of voter rolls. The Government Accountability Office found in a 2014 study that strict photo ID laws reduced turnout among Black voters by a statistically significant margin compared with white voters.