Which early cultures lived in Greenland before the Thule Inuit culture?

Before the arrival of the Thule culture in Greenland around 1100 CE, several distinct pre-Inuit cultures migrated to the island from North America via the Canadian Arctic.1

These early cultures include:

• Independence I (c. 2500–1800 BCE)1
• Saqqaq (c. 2300–900 BCE)1
• Independence II (c. 1200–700 BCE)1
• Dorset I (c. 600 BCE–100 CE)1
• Dorset II (c. 700–1200 CE)1

The Dorset culture was a significant prehistoric group that relied on hunting sea mammals and lived in small, seasonal nomadic groups. Evidence suggests that the Dorset people and the Thule Inuit had contact with one another before the Dorset culture eventually declined, a process potentially accelerated by the onset of the Medieval Cool Period.21