The answer would be Jerry Rubin
Conozco al tío ¿qué le pasa?
Answer:
Its inability to create lasting mandates.
Explanation:
Yes, inability to create lasting mandates caused the end of the League of Nations because the main purpose of the League of Nations is to impose its orders on the other nations. They don't have the ability to united on a single decision which causes differences in them that leads to failure of League of Nations. Due to this behaviour they can't counter German aggression that leads to World War II.
Former slaves could not sue in court
The most likely reason is to prevent the president from abusing its power.
Hope this helps:)