What John Marshall says is that right of occupancy can be taken away by purchase, conquest or any other means. So the reason that this case Johnson v. M'Intosh is so important is it really sets the foundation for this radical approach to understanding the basic human rights of Indian people to hold and control the lands that they occupy. It gives the US government the right to relocate, it stands at the bottom of the ethnic cleansing campaigns, for example, in the removal era.