Which tribe was the original settlers of sparta

Explanation:

Archaeologists put the date of its origin later, around 1000 BC, when a tribe called the Dorians migrated to the region. Around the year 650 BC Sparta was thoroughly reorganized by Lycurgus, who came to power after the city was humiliatingly defeated by its neighbor Argos.

from the conditions of the working class in england by friedrich engels,the main idea is :