"We hold these truths to be self-evident: That all men are created equal; that they are endowed by their Creator with certain unalienable rights; that among these are life, liberty and the pursuit of happiness..."

July 4, 1776
Declaration of Independence
1781
"Mumbet" wins her freedom in court
1783
Massachusetts becomes first independent state to abolish slavery
September 17, 1787
Constitutional Convention finishes its work
1788
US Constitution ratified on understanding that a Bill of Rights would be added
December 15, 1791
Bill of Rights added to the US Constitution
1798
Alien and Sedition Acts undermine First Amendment and permit president to deport "suspicious" immigrants
1803
Marbury v. Madison establishes judicial review
1808
Halt to slave trade under Constitution
1820
Missouri Compromise sets down rules for extension of slavery in western territory
1829
David Walker's Appeal to the Coloured Citizens of the World galvanizes opposition to slavery, alarms South
1830

Slavery at an end in all Northern states

1831
First issue of the Liberator, as abolition movement grows
Beginning of the Trail of Tears
1833
Barron v. Baltimore establishes that the Bill of Rights applies only to the actions of the federal government, not to the states
1836
Congress undermines First Amendment by barring anti-slavery petitions (the "gag rule")
1837
National Female Anti-Slavery Convention formed
1844
Congress repeals the "gag rule"
1845
"Manifest Destiny" invoked to justify western expansion
1848
Treaty of Guadalupe Hidalgo ends Mexican War; US gets a million square miles of territory
Seneca Falls Convention initiates American women's movement
1849
Harriet Tubman escapes from slavery
1850
Fugitive Slave Act provides for the return to slavery of any Black person, no matter how long he or she had been free
1854
Kansas-Nebraska Act repeals Missouri Compromise
1857
Dred Scott v. Sandford – Supreme Court rules that Black people had never possessed legal standing in US courts and "had no rights which the white man was bound to respect"
1861
Civil War
1865
Thirteenth Amendment abolishes slavery
Southern states pass Black Codes that re-establish slavery in all but name
1866
Ku Klux Klan founded in Tennessee
Civil Rights Act gives citizenship to all persons born in the US with the exception of Native Americans
1867
Reconstruction Act speeds transformation of the South
1868
Fourteenth Amendment declares states cannot deny "any person" of the "equal protection of the laws" or deprive persons of "life, liberty or property without due process of law"
1870
Fifteenth Amendment prohibits states from restricting the voting rights of men; women are left out
1873
Supreme Court begins to roll back Fourteenth Amendment
1874
In Minor v. Happersett the Supreme Court says that suffrage is not necessarily a part of citizenship and women can be deprived of the vote 
1877
Reconstruction ended by deal over a disputed presidential election
1879
Supreme Court rules that Native Americans are to be considered "persons" under US law
1882
Chinese Exclusion Act puts a halt to Chinese immigration
1890
Wounded Knee massacre brings Indian Wars to an end; symbol of Native American dispossession
National American Woman Suffrage Association unites women's suffrage movement
1891
Ida B. Wells launches anti-lynching crusade
1896
In Plessy v. Ferguson Supreme Court sanctions "Jim Crow" segregation
1901
President McKinley is assassinated; anarchists and political radicals targeted
1916
First edition of Madison Grant's Passing of the Great Race
1917
As first Red Scare intensifies, Congress passes Espionage Act to punish disloyal utterances or attempts to obstruct military recruitment
1918
Congress passes Sedition Act with stiff penalties for language that could "cause contempt" towards the government, the Constitution or flag
1920
"Palmer Raids" launched on homes, meeting places, pool halls and other public places; as many as 10,000 suspected "radicals" rounded up 
Women finally get right to vote when Nineteenth Amendment ratified
1924
Native Americans become US citizens
1925

In Gitlow v. New York Supreme Court rules for first time that the First Amendment applies to the states

Scopes trial raises profile of First Amendment and free exchange of ideas
1927
Worldwide protests erupt when Sacco and Vanzetti are executed
1935
Jehovah's Witness students first challenge flag salute in school
1940
Congress passes the Smith Act; makes it a crime to advocate the overthrow of the government
1942
Executive Order provides for removal and internment of Japanese-Americans
1943
Supreme Court overturns Gobitis and rules for the first time that the Bill of Rights applies to students in schools; they have the right to refuse to salute the flag
1944
Supreme Court in Korematsu upholds internment based on evidence from the government which later turns out to be falsified
1947
Second Red Scare gets underway when President Truman orders loyalty of federal employees be investigated
1948
Jackie Robinson integrates major leagues
1950s
McCarthy hearings broadcast on television
1954
In unanimous Brown v. Board of Education decision, Supreme Court overturns 1896 Plessy opinion and rules "separate but equal" is unconstitutional
1955
Emmett Till's murder in Money, Mississippi catalyses protests
Montgomery bus boycott begins; a year later it is successful in ending segregation on buses
1960
Sit-in movement launched by students
1963
Birmingham "Children's Crusade" confronts segregation in the city known as "Bombingham" because of Klan terror
In Gideon v. Wainwright the Supreme Court rules everyone has a right to a lawyer when tried for a crime in a state court
1964
Three civil rights workers murdered during Mississippi Freedom Summer
Civil Rights Act outlaws discrimination based on race
1965
Selma , Alabama marches lead to passage of Voting Rights Act
Supreme Court upholds fundamental right to privacy in case involving birth control
1966
In Miranda v. Arizona the Supreme Court rules that someone being held in police custody must be informed of his or her rights
1967
Supreme Court rules in In re Gault that minors also have due process protections
1969
Supreme Court in Tinker v. Des Moines School District upholds the free expression rights of students and everyone else
1970
Government spying on anti-war protestors first made public
1971
Watergate scandal begins
1973
In Roe v. Wade Supreme Court rules that protection of privacy extends to a woman's right to decide whether to terminate a pregnancy
1975
Congressional Church Committee reports on huge extent of government spying on domestic groups and individuals
1978

Congress passes the Foreign Intelligence Surveillance Act to restrain warrantless domestic spying by the government

1985

Supreme Court begins rollback of civil rights gains; rollback continues through the 80s

Supreme Court in TLO ruling defines when students can be searched in public schools

1988
In Hazelwood v. Kuhlmeier Supreme Court gives schools greater censorship powers
1994
Jury convicts Klansman for murder of civil rights activist Medgar Evers, 31 years after he was gunned down; other civil rights cases re-opened and convictions obtained throughout the 90s and early 21st century
1995
In Vernonia v. Acton, the Supreme Court narrows students' Fourth Amendment rights
1999

Columbine killings lead to crackdown on student rights in the name of safety

2001
USA PATRIOT Act is passed in the wake of September 11th attacks
Military Order establishes "military commissions" to try "war on terror" captives
2002

Guantanamo detention camp established for "enemy combatants"

2004
Supreme Court rules in Hamdi v. Rumsfeld that "a state of war is not a blank check for the President"
2005

New York Times reveals existence of warrantless spying on Americans by the National Security Agency

2006
USA PATRIOT Act reauthorized
Supreme Court rules in Hamdan v. Rusmfeld that military commissions violate international law and are illegal