What is the theme in Still Life with Woodpecker by Tom Robbins?

This core theme is evoked with deliberate emphasis about two thirds of the way through, when it manifests as the result of Leigh-Cheri's extended, imprisonment-inspired contemplation of a pack of Camel Cigarettes. The word choice, in fact, is presented in a way that none of the book's other thematic points are - it's capitalized. This suggests that although there is also significant emphasis placed on the value of freedom, particularly by Bernard, that the ultimate power of freedom lies in the power to choose.