For the fall of Rome, it was the Huns invading from the east that caused the domino effect, they invaded (pushed into) the Goths, who then invaded (pushed into) the Roman Empire. The fall of the Western Roman Empire is a great lesson in cause and effect. A cause leads to an effect. Hope this will help you!!
You do not have the freedom of speech, your rights aren’t protected at all. The people suffer while the person at top does whatever they want basically
I've done a bit of research on your question, and I have found that the answer is that he raised $1 billion dollars off of donors. I hope this is helpful. =]