I think it's because slavery costs less...just a guess.
Work was the easiest settlement was the hardest without paperwork
Clearly the establishment of the colonies comes first then next would be the Writs of Assistance, next the Intolerable Acts, Then finally the stamp act
to conserve the scenery, natural and historic objects and wildlife within the parks and to “provide for the enjoyment of the same in such manner and by such means as will leave them unimpaired for the enjoyment of future generations.
Answer:
I think Terrorism has been a challenge for the US because there have been some serious attacks that left many people dead.
