Optimism about sustainable availability of the (mainly material) conditions that you will need for living well. (Note that this doesn’t necessarily mean being naïve about material goods: it could mean being confident in your own resilient ability to flourish regardless of material conditions).
Anderson, Chris (2009) Free: The Future of a Radical Price. New York: Hyperion
Lambert, Christy (2014) Radical Abundance: A Journey From Not Enough To Plenty. Difference Press
Sidalsky, Robert, and Edward Sidalsky (2012) How Much Is Enough? Money and the Good Life. New York: Other Press