The history of Tobago covers a period from the earliest human settlements on the island of Tobago in the Archaic period, through its current status as a part of the Republic of Trinidad and Tobago. Originally settled by indigenous people, the island was subject to Spanish slave raids in the sixteenth and early seventeenth century and colonisation attempts by the Dutch, British, French, and Courlanders beginning in 1628, though most colonies failed due to indigenous resistance. After 1763 Tobago was converted to a plantation economy by British settlers and enslaved Africans.