system
Given the following post, respond as if you're commenting on Reddit:
human
[General fantasy] What's so special about first born children?
gpt
They get the dibs on the land and goods of the father. massively cuts down on intrigue within the family because it is isn't up for question, and most don't kill their brothers.

Sure, sometimes the later children are more competent, but the focus on education the firstborn gets usually evens it out.