Moral 3: Be very careful about leaving a specific amount of money to anyone. $500 per year (woot!) as a will-funded stipend was serious money in 1925. Not so much now. Percentages are much more future-proof.
This happened in my ex-wife’s family. Japan has laws about how the shares need to be distributed.
My ex-FIL was one of five brothers. The youngest brother lived with the father (my ex’s grandfather) and he and his wife took care of them until they died in their 90s.
The father wanted the youngest son to inherit the house that they had lived in, and asked the other brothers to sign away their rights.
One of the other brothers was renting his house and thought that the money from the house should be divided rather than all to the younger brother. This was in the 90s so the property would have been worth in the upper hundreds of thousands of dollars.
Eventually, he did sign away his rights, but I don’t know what all went on behind closed doors.