The movement to abolish slavery developed largely in western Judeo-Christian civilization.
In the Sermon on the Mount (Matthew 7:12), Jesus taught:
"Therefore all things whatsoever ye would that men should do to you, do ye even so to them: for this is the law and the prophets."
After 313 AD, as the Roman Empire became Christianized, slavery diminished.
In the 5th century, invading hoards overran the Roman Empire, but they were eventually converted and ceased enslaving captives.
Saint Patrick'sLetter To King Coroticus, condemning his enslavement of Irish in the 5th century was one of the first anti-slavery documents.
"Thy sheep around me are tom to pieces and driven away, and that by those robbers, by the orders of the hostile-minded Coroticus ... a man who hands over Christians to the Picts and Scots.
Ravening wolves have devoured the flock of the Lord ... You ... sell them to a foreign nation that has no knowledge of God. You betray the members of Christ as it were into a brothel ...
People who were freeborn have been sold, Christians made slaves, and that, too, in the service of the abominable, wicked, and apostate Picts!"
In the 7th century, Islam spread rapidly with conquered infidels being made chattel slaves, military slaves, domestic slaves, and concubine slaves.
Slavery was practiced by Caliphs and Sultans through the next 1,400 years.
Twice as many women were sold in the Arab Muslim slave trade than men.
"Prophet, We have made lawful to you ... the slave girls whom Allah has given you as booty." (Qur'an 33:50)
Women were put in harems, which were kept by eunuchs, both white and black male slaves who were castrated.
Black male slaves suffered more cut "level with the abdomen," resulting in high mortality rates.
The Arabic word "Abd" or "Abeed" is the name used for both "African" and "slave."
Abolitionist movements to end slavery are rare in the sharia Islamic world, as Mohammed himself owned slaves and it is forbidden to criticize him.
Vikings attacked across Europe, killing men and carrying away thousands of Christian women as captives.
These women raised their Viking children to be Christians, and eventually, the Norse kingdoms discontinued slavery.
Slavery was a significant part of the Ottoman Empires' economy for centuries, until it was ended by Ataturk, who helped found the Republic of Turkey in 1923.
Medieval Catholic Orders of Mathurins and Trinitarians collected alms and ransomed captives from North Africa Muslim slavery.
In the 16th century, Spanish and Portuguese Empires participated in the slave trade of indigenous populations, often purchasing them from Muslim slave markets in Africa and the Middle East.
In pre-Columbian America, aggressive inhabitants, such as Caribs and Aztec attacked and enslaved other tribes, sometimes using them in ritual sacrifice and cannibalism.
The Inca Empire had a system of mandatory public service known as mita, similar to the Aztec's tlacotin.
Spanish enslaved Indians in the New World, putting many to work in the Potosi silver mines
The priest Bartolomé de las Casas, motivated by the Gospel, championed the ending the enslavement of native Americans.
Sadly, once the enslavement of native Americans was outlawed, greed motivated merchants begin importing slaves from Africa.
More African slaves were imported into Brazil than into any other country -- an estimated 4.9 million were brought by the Portuguese.
After the failed invasion of England by the Spanish Armada in 1588, Catholic Spain made one more attempt by landing troops in Catholic Ireland.
In 1601, after a nine year war, Protestant England defeated the combined Catholic Irish and Spanish military at the Battle of Kinsale.
Not only were some 500,000 Irish killed, but under the reigns of Elizabeth I, James I, Charles I, and Oliver Crowmwell, an additional 500,000 Irish were sold into horrible slavery on plantations in the Caribbean and Virginia, being treated more harshly due to religious animosities.
In the book To Hell or Barbados (2000), Sean O’Callaghan wrote:
"However, from 1625 onward the Irish were sold, pure and simple as slaves. There were no indenture agreements, no protection, no choice.
They were captured and originally turned over to shippers to be sold for their profit.
Because the profits were so great, generally 900 pounds of cotton for a slave, the Irish slave trade became an industry in which everyone involved (except the Irish) had a share of the profits."
As the 17th century progressed, the African slave trade increased with Dutch, French and English merchants.
The first African slaves were brought to the colony of Virginia in 1619, on a Dutch ship which had seized them from a Spanish ship.
Originally, African slaves brought to Virginia served seven years and were freed.
A black indentured slave from Angola named Anthony Johnson arrived in Virginia in 1621.
He completed his indentured service and was freed. He became one of the first Africans to own property in America, acquiring a 250 acre tobacco plantation.
Anthony Johnson owned four white slaves and one black slave, John Casor.
After seven years, Casor expected that he was freed. He left to work for wages as a free man on another farm.
Sadly, Anthony Johnson brought a lawsuit in 1655 to keep his African slave, John Casor, as a permanent slave, and won.
This made John Casorone of the first persons of African descent in the 13 English Colonies to be a slave for life.
The Royal African Company was founded in 1672 and brought an estimated 100,000 slaves to the New World.
In the early 18th century, Quakers, led by abolitionist Anthony Benezet, consistently lobbied to end slavery.
Slavery expanded in America significantly after Eli Whitney invented the cotton gin in 1794, turning cotton into the main crop in America's South.
French officer Marquis de Lafayette had joined the American Revolutionary, being considered almost as an adopted son of General George Washington.
After the war, Lafayette returned to France and joined the French abolitionist Society of the Friends of the Blacks, which advocated the end of the slave trade and equal rights for blacks.
The French Revolution ended slavery in France, but not in French colonial holdings, such as Louisiana and Haiti.
Washington encouraged Lafayette, April 5, 1783:
"The scheme ... which you propose as a precedent, to encourage the emancipation of the black people of this Country from that state of Bondage in which. they are held, is a striking evidence of the benevolence of your Heart.
I shall be happy to join you in so laudable a work; but will defer going into a detail of the business, 'till I have the pleasure of seeing you."
Lafayette's plan to emancipate all slaves was thought impossible by some, to which he replied:
"If it be a wild scheme, I had rather be mad in this way, than to be thought wise in the other task."
In the last 6 years of Washington's life, he attempted to take four of the farms on his plantation and make them into rental properties, thus transitioning away from slavery.
On May 10, 1786, George Washington wrote from Mount Vernon to Marquis de Lafayette:
"Your late purchase of an estate in the colony of Cayenne, with a view of emancipating the slaves on it, is a generous and noble proof of your humanity. Would to God a like spirit would diffuse itself generally into the minds of the people of this country."
Some well-known American founders advocated abolishing slavery:
John Quincy Adams
Richard Bassett, a signer of the Constitution, became an enthusiastic Methodist Christian and freed all his slaves, paying them as hired labor.
Another anti-slavery leader was Rufus King, was born March 24, 1755.
Rufus King was a Harvard graduate who was an aide to General Sullivan during the Revolutionary War.
At 32 years old, Rufus King was one of the youngest signers of the U.S. Constitution.
Rufus King later served as U.S. Minister to England, U.S. Senator from New York, and was a candidate for U.S. President.
In 1820, during the debates of the Tallmadge Amendment when Missouri was petitioning for statehood, Senator Rufus King told the U.S. Senate:
"I hold that all laws or compacts imposing any such condition as slavery upon any human being are absolutely void because they are contrary to the law of nature, which is the law of God."
John Jay helped draft New York's first Constitution. He proposed it abolish slavery, writing to Robert Livingston and Gouverneur Morris, April 29, 1777, that there should be:
"... a clause against the continuation of domestic slavery."
Jay helped found the New York State Society for Promoting the Manumission (Freeing) of Slaves in 1785, filing lawsuits on behalf of slaves.
He wrote to Benjamin Rush, March 24, 1785:
"I wish to see all ... discriminations everywhere abolished, and that the time may soon come when all our inhabitants of every color and denomination shall be free and equal partakers of our political liberty."
Jay helped found New York's African Free School in 1787 and supported it financially.
He even bought slaves in order to immediately free them, writing:
"I purchase slaves and manumit (free) them."
Jay was appointed by George Washington to be the first Chief Justice of the U.S. Supreme Court, serving from 1789 to 1795.
As second Governor of New York, John Jay signed an Act for the Gradual Abolition of Slavery in 1799, prohibiting the exportation of slaves and making a path for children of slaves to attain freedom.
Jay was also president of the American Bible Society, 1821-1828.
Newspaper editor Horace Greeley wrote in 1854:
"To Chief Justice Jay may be attributed, more than to any other man, the abolition of Negro bondage in this State."
Francis Scott Key labored for seven years before the Supreme Court to free 300 African slaves from the ship Antelope captured off the coast of Florida in 1820.
Jonathan M. Bryant wrote in Dark Places of the Earth: The Voyage of the Slave Ship Antelope (2015):
"Most startling of all, Key argued ... that all men were created equal ... If the United States had captured a ship full of white captives,
Key asked, would not our courts assume them to be free? How could it be any different simply because the captives were black?"
In 1841, two years before his death, Francis Scott Key helped former President John Quincy Adams free 53 African slaves in the Amistad case.
In his 1844 decision, Supreme Court Justice Joseph Story helped establish the illegality of the slave trade, as portrayed in Steven Spielberg's 1997 movie Amistad.
Salmon P. Chase coined the slogan of the Free Soil Party:
"Free Soil, Free Labor, Free Men."
A member of the newly created Republican Party, Salmon P. Chase defended so many escaped slaves that he was nicknamed "Attorney-General of Fugitive Slaves."
Salmon P. Chase was appointed by President Abraham Lincoln as Chief Justice of the Supreme Court where he admitted John Rock as the first African-American attorney to argue cases before the Supreme Court.
Lincoln's Secretary of State was William Seward.
A life-long abolitionist, Seward and his wife helped with the Underground Railroad, lent money to Frederick Douglass for his North Star Newspaper, and helped Harriet Tubman purchase property in their hometown of Auburn, New York.
An attempt was made on Seward's life the same night Lincoln was assassinated.
Seward arranged the purchase of Alaska from Russia in 1867.
The U.S. Minister to Russia who helped negotiate the purchase of Alaska was Cassius Marcellus Clay.
Cassius Clay heard William Lloyd Garrison speak while a student at Yale and became an abolitionist.
Clay helped to found the Republican Party and served three terms as a Kentucky Representative till he lost his seat due to his strong anti-slavery views.
In 1843, pro-slavery Democrats attacked Cassius Clay and shot him in the chest, but he was able to fight them off with his Bowie knife.
In 1845, Clay began publishing the anti-slavery newspaper The True American.
He received death threats and had to barricade his newspaper office doors. A pro-slavery Democrat mob broke in and stole his printing equipment.
In 1849, while making an anti-slavery speech, Clay was again attacked, beaten, stabbed, and almost shot, till he fought off his attackers.
Cassius Marcellus Clay helped pressure Republican President Abraham Lincoln to issue the Emancipation Proclamation.
Near the end of the Civil War, in which hundreds of thousands died freeing the slaves, Republican President Abraham Lincoln pushed through the 13th Amendment officially ending slavery in the United States.
By the late 1800s, slavery ended in Caribbean, Central and South America.
Slavery continued in Africa.
Lord Baden-Powell wrote in his book, The Downfall of Prempeh (1896), of the cruel African Ashanti King (Ghana) would sell his people into slavery, many for human sacrifice:
“Every tribe in the neighborhood of Ashanti lived in terror of its life from the king, who had on several occasions destroyed, one after another, tribes which had sough our protection ...
In England we scarcely realize the extent to which human sacrifice had been carried on in Ashanti."
David Livingstone, missionary to the Congo, described described Muslim caravans of 1,000 Africa slaves tied together with neck yokes or leg irons, marching single file 500 miles down to the sea carrying ivory and heavy loads.
If they walked too slow, they werespeared and left to die, resulting in caravans being traced by vultures and hyenas feasting on corpses.
In India, generational indebtedness sees rural peasants born in debt, live in debt and die in debt.
The Human Rights Commission of Pakistan has worked to free some of the thousands in southern Singh held in leg-irons due to unpaid debt and forced to harvest cane.
The U.S. State Department in 1993 estimated 90,000 Southern Sudanese were captured and taken into slavery by North African Arabs.
UNICEF estimated 200,000 children a year are sold from West and Central Africa to be domestic, agricultural, and sex slaves in neighboring countries.
William and Catherine Booth began the Salvation Army to rescue girls from sex-slavery in England.
During World War II, Imperial Japan made sex slaves of tens of thousands of Korean, Philippine, and Chinesewomen and girls.
Called "comfort women," they were kept at "comfort stations" for Imperial Japanese soldiers.
Accounts persist of young girls in Thailand and other Asian countries sold into lives of prostitution.
Yazidi, Christian, and other non-Muslim women have been forced into sex slavery by the Islamic State.
Georgetown University Professor Jonathan Brown, holder of the Al-Waleed bin Talal Chair in Islamic Civilization, delivered a lecture, February 7, 2017, explaining how slavery and non-consensual sex (rape) are acceptable practices under Islamic sharia law.
Aleksandr Solzhenitsyn and millions of Russian dissidents were enslaved in Soviet "gulag" prison camps.
The Geneva Summit for Human Rights and Democracy heard accounts of the thousands held in North Korean slave labor camps.
The International Labor Rights and Education Fund works to rescue some of thousands of kidnapped children in India locked rooms forced to weave carpets.
Modern-day ministries, such as Christian Solidarity International, collect donations to purchase freedom for thousands out of slavery in Muslim controlled areas of Africa.
It is significant when examining slavery throughout world history, that it was Christian motivation, from the Quakers, to the Methodists, to the Second Great Awakening, to William Wilberforce, to the Salvation Army, and more, which was a driving force to abolish slavery.
As New York Senator Rufus King told the U.S. Senate:
"All laws ... imposing any such condition as slavery upon any human being are absolutely void because they are contrary to the law of nature, which is the law of God."