Delaware entered the union first for a number of reasons. First, Delaware was a relatively small state with a population of only about 59,000 people in 1790. This made it easier to organize and govern than some of the larger states, such as Virginia and Massachusetts. Second, Delaware had a strong economy based on agriculture and trade, and it was relatively prosperous compared to other states at the time. This made it more attractive to potential settlers, who were drawn to the state's economic opportunities. Finally, Delaware was geographically well-positioned to be the first state to enter the union. It was located on the Atlantic coast, which made it easy for settlers to travel to and from the state. Additionally, Delaware was near the border with Pennsylvania, which was one of the most populous and influential states at the time. As a result of these factors, Delaware became the first state to ratify the U.S. Constitution on December 7, 1787, and thus became the first state to enter the union.