Earth + Water = Plant
Plant + Plant = Tree
Tree + Tree = Forest
Forest + Tree = Wood
Wood + Wood = House
House + House = Village
Village + Village = Town
Town + Town = City
City + City = Metropolis
Metropolis + City = Kingdom
Kingdom + Human = King
Earth + Water = Plant
Plant + Plant = Tree
Tree + Tree = Forest
Forest + Tree = Wood
Wood + Wood = House
House + House = Village
Village + Village = Town
Town + Town = City
City + City = Metropolis
Metropolis + City = Kingdom
Kingdom + Human = King