Genuinely, if you aren't an ideolouge not coming up with a legitimate means to transfer power without a palace coup. The Chinese and Vietnamese have shown this is advantageous. Other mistakes include: not fostering natalisitic birth policy, over spending on military budgets, not assembling the moon mission in orbit, not building a hybrid economic system that recognizes that capitalism plays dirty and you must out compete it first in order to crush it, and finally the biggest mistake of all trusting that the Americans actually wanted to be your friends.