Alexander, this rule may have emerged from Egyptian courtier society as it can be translated as you scratch my back and I'll scratch yours or at best in a situation where getting on is essential otherwise we might both lose our privileges, be courteous to each. You may rise but equally you may fall, and in the competitive environment of the court, you may meet and need other people you outdistanced on the way up, on the way down. Expediency therefore rather than morality.

The "Golden Rule," often expressed as "treat others as you would like to be treated," is indeed a fundamental principle in many ethical systems. It emphasizes empathy, reciprocity, and the consideration of others' well-being, and it exists in various forms across cultures and religions. It's a guiding principle for moral behavior and fostering positive social interactions.