<span>Andrew Jackson was born on March 15, 1767 in Waxhaw, South Carolina. He was the 7th President of the United States who died on June 8, 1845. Jackson's efforts to limit the power of the affluent elite led to his reputation for 'Jacksonian Democracy.'</span>
Because they were all Islamic empires, they all united. Even though some empires included other cultures, they all included Islam, which made them unite.
The invention of cell phones because you could call each other email or text each other in minutes
I know this really isn't an answer but I know Crash Course has a video on it on YouTube.
He didn't want him to see the "passing sights" (old age, sickness, death, and a wandering ascetic) and become a king