input: [CIRCULAR to 1720] Natural cycles Seasons Plants and Animals Celestial bodies [PROGRESSIVE c. 1720-1790] From dark to light (enlightenment). From rough to smooth. Simple to complex [PESSIMISM c. 1790-1820] Natural cycles. Birth to death. Historical cycles. [EVOLUTIONARY c. 1840-1890] Organic From seed to plant Division Diversification Complexity [DIFFUSIONIST c. 1890-1920] Ripples in water. Spread of species [0] 
output: METAPHOR
options: P E O P L E
options: T I M E
options: P O W E R
options: M E T A P H O R
options: Q U E S T I O N
options: M O D E L
options: V A L U E