Quaternary Essays - applying Shakespeare’s nature-based philosophy to life and art celebrates, in part, the founding of the Quaternary Institute twenty years ago in 2000. The Quaternary Institute website www.quaternaryinstutute.com was established at the same time and Quaternary Imprint followed with the publication in 2005 of the four-volume 1760-page slip-case set William Shakespeare’s Sonnet Philosophy. The opening essay first demonstrates how to use the Nature template derived from Shakespeare’s 1609 Sonnets to critique nine major inconsistencies and prejudices in Tertiary thinking and then explores the reverse psychological techniques he uses to defuse them. In the second half, the remaining essays consider quaternary creativity, the female default, democracy and inadequacies in Tertiary pedagogy.