What is the central idea of the following passage?

Question

I was born in Tuckahoe, near Hillsborough, and about twelve miles from Easton, in Talbot county, Maryland. I have no accurate knowledge of my age, never having seen any authentic record containing it. By far the larger part of the slaves know as little of their ages as horses know of theirs, and it is the wish of most masters within my knowledge to keep their slaves thus ignorant.

Answer 1

The central idea of the passage is the lack of knowledge and control that enslaved individuals have over their own lives, including the absence of accurate records of their age.