I think it was to use immagrents to do the work.
<span>The empire grew rich from the trans-Saharan trade in gold and salt. This trade produced an increasing surplus, allowing for larger urban centers. It also encouraged territorial expansion to gain control over the lucrative trade routes. Hope this answers the question.</span>
<span>they were not uniform, as each states constituation had different stipulation</span>
James I, (born June 19, 1566, Edinburgh Castle, Edinburgh, Scotland—died March 27, 1625, Theobalds, Hertfordshire, England), king of Scotland (as James VI) from 1567 to 1625 and first Stuart king of England from 1603 to 1625, who styled himself “king of Great Britain.” James was a strong advocate of royal absolutism, and his conflicts with an increasingly self-assertive Parliament set the stage for the rebellion against his successor, Charles I.
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