1. Sex, Culture and Conflict: The Emergence of Proto-History on the Sugarscape Sajeev P. Cherian BIT 885 Class Presentation Ross School of Business University of Michigan November 22, 2005 Sajeev P. Cherian BIT 885 Class Presentation Ross School of Business University of Michigan November 22, 2005

2. Introduction  Goal: to grow a social history including procreation, cultural transmission and inter-cultural conflict from the bottom up using simple local rules.

3. Sex on the Sugarscape  New Rules: S (Sex) and I (Inheritance)  Emergent Phenomena I (G 1, M, S):  Natural Selection (vision, metabolism)  Fitness - sustainable co-evolution  Population Oscillations (modified S)  Emergent Phenomena II (G 1, M, S, I):  I retards natural section  I increases wealth inequality  New Rules: S (Sex) and I (Inheritance)  Emergent Phenomena I (G 1, M, S):  Natural Selection (vision, metabolism)  Fitness - sustainable co-evolution  Population Oscillations (modified S)  Emergent Phenomena II (G 1, M, S, I):  I retards natural section  I increases wealth inequality

4. Cultural Transmission  New agent property: cultural tag  Culture rule (K) includes both tag-flipping and tag majority  Vertical/Horizontal cultural transmission  Emergent Phenomena (G 1, M, K):  Convergence to one culture (I.e. K is sufficient to generate cultural groups  Networks of Friends  New agent property: cultural tag  Culture rule (K) includes both tag-flipping and tag majority  Vertical/Horizontal cultural transmission  Emergent Phenomena (G 1, M, K):  Convergence to one culture (I.e. K is sufficient to generate cultural groups  Networks of Friends

5. Combat  New Rule: C   Emergent Phenomena:  Takeover/sparse co-existence (G 1, C infinity )  Trench war (G 1, C 2, R [60,100] )  Eliminates colliding waves (G 1, C 2 )  Group Defense via assimilation (G 1, C infinity, K)  New Rule: C   Emergent Phenomena:  Takeover/sparse co-existence (G 1, C infinity )  Trench war (G 1, C 2, R [60,100] )  Eliminates colliding waves (G 1, C 2 )  Group Defense via assimilation (G 1, C infinity, K)

6. Conclusion: Proto-History  Desire for sugar produces migration and spatial segregation.  Each sub-population converges to pure red or blue  Sexual reproduction increases each tribe’s population…forcing migration down the mountain.  Tribes interact perpetually  Desire for sugar produces migration and spatial segregation.  Each sub-population converges to pure red or blue  Sexual reproduction increases each tribe’s population…forcing migration down the mountain.  Tribes interact perpetually