While the natural world provides us with material necessities - food, clothing, medicine, clean air, pure water - it just as importantly plays a key role in other aspects of our lives, including intellectual capacity, emotional bonding, aesthetic attraction, creativity, imagination, and even the recognition of a just and purposeful existence. As Kellert explains, each expression of biophilia shows how our physical, material, intellectual, emotional, and spiritual well-being is to a great extent dependent on our relationships with the natural world that surr