The legacy of the Plantation remains disputed. According to one interpretation, it created a society segregated between native Catholics and settler Protestants in Ulster and created a Protestant and British concentration in north east Ireland. This argument therefore sees the Plantation as one of the long-term causes of the Partition of Ireland in 1921, as the north-east remained as part of the United Kingdom in Northern Ireland. This however does not take into account the numbers of Catholic British that settled or the amount of natives who adopted Protestantism and a British identity along with settlers who became Catholics and adopted an Irish identity.