In the mid-19th century, California-bound mail had to either be taken overland by a 25-day stagecoach or spend months inside a ship during a long sea voyage. The Pony Express, meanwhile, had an average delivery time of just 10 days. To achieve this remarkable speed, company owners William H. Russell
The transatlantic slave trade was really a triangle. Here's a map to show the approximate routes. The trade was brought about to benefit the economy of Caribbean nations and Europe. The slaves were forced into awful conditions; cramped boats and harsh climates with which to toil away picking cotton or whatnot.
Since the Constitution was written in the 1770s there needs to be a law allowing it to change. As society becomes more evolved the constitution needs to be able to evolve with it. Many laws in the original constitution no longer apply so they have been removed to keep up with the times.
