* Intermarriage between different groups. As different immigrant groups arrived in New England, they began to intermarry with each other. This led to the creation of a more diverse population.
* The growth of trade and commerce. As New England's economy grew, it became more interconnected with the rest of the world. This led to increased contact with people from different cultures and backgrounds.
* The rise of religious toleration. In the early years of New England, religious dissenters were often persecuted. However, as the century wore on, religious toleration became more widespread. This allowed people of different faiths to live together peacefully.
All of these factors contributed to New England becoming more diverse as the 17th century wore on. By the end of the century, New England was home to a wide variety of people from different backgrounds and cultures.