What is the passage mainly about?

In the history of India the regime of the Slave Dynasty was not a happy one. In going back to the reign of the servants in my own life's history I can find nothing glorious or cheerful touching the period. There were frequent changes of king, but never a variation in the code of restraints and punishments with which we were afflicted. We, however, had no opportunity at the time for philosophising on the subject; our backs bore as best they could the blows which befell them: and we accepted as one of the laws of the universe that it is for the Big to hurt and for the Small to be hurt. It has taken me a long time to learn the opposite truth that it is the Big who suffer and the Small who cause suffering.

I now sometimes wonder why such cruel treatment was meted out to us by the servants. I cannot admit that there was on the whole anything in our behaviour or demeanour to have put us beyond the pale of human kindness. The real reason must have been that the whole of our burden was thrown on the servants, and the whole burden is a thing difficult to bear even for those who are nearest and dearest. If children are only allowed to be children, to run and play about and satisfy their curiosity, it becomes quite simple. Insoluble problems are only created if you try to confine them inside, keep them still or hamper their play.