The hunter-gatherer lifestyle gives way almost completely to sedentary agriculture. Villages around the Basin of Mexico and the Soconusco region of coastal Guatemala establish trade routes, and social organization becomes increasingly complex. Rapid development of the Olmec site of San Lorenzo, Veracruz, after 1200 B.C., includes massive basalt sculptures. An iconographic system with its roots in the Gulf Coast spreads across Mesoamerica, as evidenced in the ceramics of central Mexico and in monumental sculpture and carvings as far south as Honduras and El Salvador.