Using Clone troopers to explain slavery

Few months ago, my seven years old asked if all blacks were slave in ancient time!!!I was surprised. I did manage to explain the concept of servitude and greed, using "Star wars". He loves clone troopers. So I took the clones for example. Clone troopers are used as slaves, because their only purpose is to fight to death for someone else. I told him that slavery always existed among humans, from Europe to Asia, Africa,and to America. The clones were created by Palpatine. He was greedy and immoral. He wanted power at any cost. Clones are humans not machines. Slavery is what happened when people pretend that the others are machines not humans.

All humans desire freedom regardless of  skin color. I pointed out that he loves Captain Rex, and Commander Cody because they think freely. They are free even if they are serving the republic.By thinking freely and having the respect of the Jedi, Rex and Cody are not slaves. However, they are still in servitude.The Jedi do not like the situation of the clone Army. The Jedi hope that by winning the war.The clones will be free.

Today, we also have clone troopers, Jedi and Sith. Some people are still treated like slaves or servants. Blacks were slaves as well as other races. And he should not worry because they are Jedi in every race!!So everybody will win. My young padawan did listen. He was relieved that all blacks were not slaves!

Here

Here a quote from a slavery Timeline.

 "Before 1400: Slavery had existed in Europe from Classical times and did not disappear with the collapse of the Roman Empire. Slaves remained common in Europe throughout the early medieval period. However, slavery of the Classical type became increasingly uncommon in Northern Europe and, by the 11th and 12th centuries, had been effectively abolished in the North. Nevertheless, forms of unfree labour, such as villeinage and serfdom, persisted in the north well into the early modern period. In Southern and Eastern Europe, Classical-style slavery remained a normal part of the society and economy and trade across the Mediterranean and the Atlantic seaboard meant that African slaves began to appear in Italy, Spain, Southern France, and Portugal well before the discovery of the New World in 1492. From about the 8th century onwards, an Arab-run slave trade also flourished, with much of this activity taking place in East Africa, Arabia, and the Indian Ocean. In addition, many African societies themselves had forms of slavery, although these differed considerably, both from each other and from the European and Arabic forms. Although various forms of unfree labour were prevalent in Europe throughout its history, historians refer to 'Chattel Slavery', in which slaves are commodities to be bought and sold, rather than domestic servants or agricultural worker."