Answer: Since 1981 when it originated
Explanation:
Our world would most likely be filled with art and culture more than now. Art, science and such were a big part of Roman culture.
Because of the discovery of gold in San Francisco in 1848, many people began moving west to search for wealth and fame. The United States was discovering many things underground...gold, silver, and oil. These were some of the natural resources the United States had at the end of the 1800s.
They had to stay in Angel island for so long because they had to go through physical exams and check ups and if the were sick the would be quarantined