Basically its stands that the Amarr believe that to unite humanity they must bring everyone under the banner of their faith (nothing wrong with being religious in my books, hope is a wonderful thing) and in doing so believe it is their divine mission to make one empire.

Because of this their tradition of conquering the larger poplui from their homeworld Athra, led them to make slavery an aspect of their culture out of necessity, and in doing so it soon became a part of their religious doctrine that slaves were to be taken so that the other peoples of New Eden would know the trials the Amarr suffered on Athra before they could come to the realisation that the Faith was pure.

An example of this was the Ni Kunni peoples, while not in keeping with the tenets of the Faith, their own religion being closer to that of the Sani, were a people who submitted to the Amarr. Their acceptance of a new culture and way of life saw the majority of them enslaved for no more than a generation and as a result they were amalgamated into the Empire.

The Minmatar on the other hand were a people who grew to power on Paradise world, their own histories were rife with tribal slavery and forced labour, however the Amarr looked at them and had high hopes for them. However the Minmatar are a natural aggressive and stubborn people.

Unlike the Ni Kunni they took the chance to resist at every turn.

Now admittedly lets not give the Minmatar more credit than they are due, they bested a weakened Amarrian Empire after the battle of Vak Akioth and were aided and supplied by the Gallente.

No doubt they fought valiantly, but millions died either side of the war because that's what it was. With Billions of Minmatar slaves rebelling across all planets and systems orbital bombardments were carried out. Some would call this an atrocity but in a war where the enemy is nestled amongst the urban centres and rebelling from our own fortifications it is a necessary tactic.

Now we can move on to the Elder Fleet, a massive invasion of the Empire by the Minmatar with the intent to free any Slaves that could be found and kill any Amarr possible. Halted only by the timely return of the Empress to the Empire single handledly wiping out the Minmatar fleet with a device of untold destruction.

In short the Amarr do what they do to ensure the spiritual enlightenment and repurposing of the subjugated races for what they see to be the betterment of Mankind as a whole, and the Empire itself.

Admittedly in recent years that Amarr have gone through a tempering. In the wake of the peacemaking Emperor Heideran the Amarr forbade violence against slaves as a tool of control, amongst other acts of galactic peacekeeping which earnt the Emperor the Aldonis Statue, for his efforts.