Aboriginal title represents one of the most remarkable and controversial legal developments in the common law world of the late-twentieth century. Overnight it changed the legal position of indigenous peoples. The common law doctrine gave sudden substance to the tribes' claims to justiciable property rights over their traditional lands, catapulting these up the national agenda and jolting them out of a previous culture of governmental inattention. In a series of breakthrough cases national courts adopted the argument developed first in western Canada, and then New Zealand and Australia by a handful of influential scholars. By the beginning of the millennium the doctrine had spread to Malaysia, Belize, southern Africa and had a profound impact upon the rapid development of international law of indigenous peoples' rights.