GATT was signed on October 30, 1947, in Geneva, Switzerland.

The main objective of GATT was to reduce tariffs and other trade barriers among its member countries, in order to promote free trade and economic growth.

There were 23 original signatories to GATT, including the United States, the United Kingdom, and France.

The most significant achievement of GATT was the reduction of tariffs among its member countries, which led to increased trade and economic growth.

The main criticism of GATT was that it was too protectionist, as it allowed member countries to maintain high tariffs on certain products.

GATT was replaced by the World Trade Organization (WTO) on January 1, 1995.

The main functions of the WTO are to administer and enforce trade agreements, to provide a forum for trade negotiations, and to settle trade disputes.

As of 2023, the WTO has 164 member countries.

The most-favored-nation (MFN) principle is a principle that requires countries to treat all other countries equally in terms of trade, meaning that they cannot discriminate against any particular country.

The national treatment principle is a principle that requires countries to treat foreign goods and services the same as domestic goods and services, meaning that they cannot discriminate against foreign goods and services.

The purpose of the dispute settlement mechanism in the WTO is to resolve trade disputes between member countries, to impose sanctions on countries that violate trade agreements, and to compensate countries that are harmed by trade disputes.

The Doha Round of trade negotiations is a round of trade negotiations that began in 2001 and is still ongoing.

The main objective of the Doha Round is to reduce tariffs and other trade barriers among WTO member countries, in order to promote free trade and economic growth.

The main challenges facing the Doha Round include disagreements between developed and developing countries, disagreements between different sectors of the economy, and disagreements between different countries.

The WTO is likely to continue to play an important role in promoting free trade in the future, as it is the only global organization that brings together all major trading countries.