The reason that slavery isn't acceptable anywhere in the modern world is because of the British people's 60-year crusade against it.
"The spirit of liberty is so deeply ingrained in our constitution that a slave, the moment he lands in England, is free."
Sir William Blackstone
"As soon as a person set foot on English soil, he or she becomes free."
Lord Henley
"As soon as a negro comes to England he is free."
Judge Holt
http://en.wikipedia.org/wiki/Slavery_at_common_law
Sources:
Frankie Boyle's article
http://www.theguardian.com/commentisfree/2015/apr/20/britain-criminally-stupid-race-immigration
Infrastructure effects of immigration
http://www.independent.co.uk/news/uk/home-news/mass-immigration-report-warns-of-strain-on-britains-infrastructure-caused-by-population-growth-9641788.html
Etymology of slave
http://www.etymonline.com/index.php?term=slave
Origins of Slavery
http://www.bbc.co.uk/worldservice/africa/features/storyofafrica/9chapter1.shtml
Number of slaves taken by Britain
http://www.slaverysite.com/Body/facts%20and%20figures.htm
The pre-existing African slave trade
http://www.afbis.com/analysis/slave.htm
Slavery is ancient - Delos
http://www.perseus.tufts.edu/hopper/text?doc=Strab.+14.5.2&redirect=true
Rome
http://en.wikipedia.org/wiki/Slavery_in_ancient_Rome#Demography
African slave owners
http://www.bbc.co.uk/worldservice/africa/features/storyofafrica/9chapter2.shtml
Arab slave trade
http://www.bbc.co.uk/worldservice/africa/features/storyofafrica/9chapter3.shtml
http://www.arabslavetrade.com/
http://www.landoverbaptist.net/showpost.php?p=860688&postcount=4
Castration of slaves
http://atlantablackstar.com/2014/06/02/10-facts-about-the-arab-enslavement-of-black-people-not-taught-in-schools/
http://www.liveleak.com/view?i=2e4_1363974105
Still selling slaves
https://themuslimissue.wordpress.com/2012/11/30/saudi-man-is-trying-to-sell-his-castrated-black-african-slave-on-arab-version-of-facebook/
http://www.danielpipes.org/2687/saudis-import-slaves-to-america
http://www.frontpagemag.com/2012/dgreenfield/saudi-offers-castrated-african-slave-for-sale-on-facebook/
Domesday Book states approx 10% of people in England were slaves
http://www.domesdaybook.net/helpfiles/hs2970.htm
William the Conqueror outlaws slave trade
http://legacy.fordham.edu/halsall/source/will1-lawsb.asp
Synod of Westminster - the church abolishes slavery in 1102
http://en.wikipedia.org/wiki/Synods_of_Westminster
Abolitionism - Granville Sharp
http://en.wikipedia.org/wiki/Granville_Sharp
Society for Effecting the Abolition of the Slave Trade
http://en.wikipedia.org/wiki/Society_for_Effecting_the_Abolition_of_the_Slave_Trade#cite_note-1
Chronology of Abolitionism
http://www.reuters.com/article/2007/03/20/uk-slavery-chronology-idUSL1561464920070320
British proselytises abolitionism to the continent
http://www.bbc.co.uk/history/british/empire_seapower/antislavery_01.shtml
Outlawing of Slavery in the Empire
http://en.wikipedia.org/wiki/Slavery_Abolition_Act_1833
The might of Britain brings the transatlantic slave trade to an end
http://www.bbc.co.uk/history/british/abolition/royal_navy_article_01.shtml
The Blockade of Africa
http://en.wikipedia.org/wiki/Blockade_of_Africa
Outro Music
https://www.youtube.com/watch?v=etDon1LH1vA
1:34
23:28
9:10
32:28
4:26