In today's economy, we have not only rich and poor people but also rich and poor countries. This is because we do not exist in a __________, a world society consisting of only sovereign, self-contained territories. Instead, we are part of a __________, a global market organized by a capitalist economy. a. global city; nation-state system b. nation-state system; world system c. world system; nation-state system d. world system; global city