Poverty is the state of human beings who are poor. That is, they have little or no material means of surviving—little or no food, shelter, clothes, healthcare, education, and other physical means of living and improving one's life. Some definitions of poverty, are relative, rather than absolute, poverty reduction would not be considered to apply to measures which resulted in absolute decreases in living standards, but technically lifted people out of poverty. Poverty reduction measures, like those promoted by Henry George in his economics classic Progress and Poverty are those that raise, or are intended to raise, enabling the poor to create wealth for themselves as a means for ending poverty forever. In modern times, various economists within the georgism movement propose measures like the land value tax to enhance access by all to the natural world.