This document discusses protectionism and trade liberalization. It defines protectionism as policies that restrict trade between countries, usually through tariffs, quotas, and non-tariff barriers. Tariffs increase import prices while quotas restrict quantities. Non-tariff barriers make trade costly through regulations and standards. Protectionism aims to protect domestic industries, jobs, and culture. Trade liberalization seeks to reduce barriers and promote free trade based on comparative advantage. Major trade organizations like GATT and WTO negotiate liberalization through agreements but achieving worldwide agreements faces challenges.