 Eco-socialists like Kovel stress that this contradiction has reached a destructive extent, where certain essential activities such as caring for relatives full-time and basic subsistence are unrewarded while unnecessary economic activities earn certain individuals huge fortunes.Green anarchism is a school of thought within anarchism which puts a particular emphasis on environmental issues.An important early influence was the thought of the American individualist anarchist Henry David Thoreau and his book "Walden" as well as Leo Tolstoy and Elisee Reclus.