The Chesapeake region reached such heights after such an unusual and unfortunate start due to various changes in population, economy and family composition. From 1630 to 1800, the demographics of the Chesapeake region changed ceaselessly. A key factor contributing to the sporadic changes in the population was the mortality rate. In the Chesapeake region, the age at which people died dropped as time passed. Document 7 demonstrates the increased mortality rate by showing that the average Chesapeake-born men who reached age 20, born between 1670 and 1679, lived longer than those born in later years, such as between 1720 and 1729. Although people died younger as the years passed, the population continually grew. For example, the average population of whites in the Chesapeake region in 1640 was about 3,901 people, but by 1770 the population grew to an average of about 133,180 whites, about 34 times higher than in 1640. However, the arrival and the settlement of British migrants contributed largely to the thriving population of the Chesapeake region. Religious tolerance or religious heterogeneity, especially in Maryland, may have been an element that may have influenced more British migrants to travel to the Chesapeake region. Document 4 shows that in the years 1630 to 1640, approximately 21.9 to 24.6 percent of all British migrants went to the Chesapeake region. From 1690 to 1700, migrants to the Chesapeake region increased from approximately 15,800 to 16,000 out of 44,100, or from 35.8 to 33.0 percent. Some migrants became indentured servants to pay for their transportation to the colonies. However, as plantations increased and grew, serfs were gradually replaced by slaves, as shown in document 10. Starting from the middle of the document, ... and 18.1 years of age. However, between 1740 and 1749, on average, women married at around 22 years of age. As a result, women were having fewer children. The average full family size, as given in the sixth source, was 9.4 in 1650-1700, but decreased to 6.9 in 1750-1800. Some families depended on inherited wealth. Document 18 shows the "division of property" in Middlesex County, Virginia, from 1699 to 1750. While through 1699, 93% of all sons received land, only 62% received land between 1720 and the 1750s. As the division of land among sons declined, so did the population of people with land and wealth. Although the Chesapeake region faced many obstacles such as the "starvation period", deadly diseases and severe population shortages, it ultimately evolved and grew due to population growth, economic fluctuation and changes in the situation . family composition.