premise: James VI and I began the Plantation of Ulster.
hypothesis: James VI and I . In his reign , the Plantation of Ulster and British colonization of the Americas began . The Plantation of Ulster ( Plandáil Uladh Ulster-Scots : Plantin o Ulstèr ) was the organised colonisation ( plantation ) of Ulstera province of Irelandby people from Great Britain during the reign of King James I. Most of the colonists came from Scotland and England .