The Ross Learning System is a literary narrative of the evolution of human consciousness that unfolds chronologically through the grades. Cultural History is the core of the Curriculum. It is taught chronologically through the grades as a dynamic system expanding in complexity. Each grade focuses on the thematic development of a particular historical period and studies this theme across global cultures while integrating with all other disciplines. In this way, the Spiral provides a cohesive architecture for analysis of the past as a dynamical system and enables students to more fully understand the present while envisioning the future.