The Spanish Conquistadors killed 90% of the Native population once they landed on North America because of the diseases they Brint over such as yellow fever and typhus.
If im not mistaken each term is 4 years a president can be reelected for another term but only once because the max is 8 years, 2 four year terms.
The historical origins of the free enterprise system are different for each perso just look around on google
