As soon as the agreements go beyond the regional level, they need help. The World Trade Organization intervenes at this stage. This international body contributes to the negotiation and implementation of global trade agreements. This view became popular for the first time in 1817 by the economist David Ricardo in his book On the Principles of Political Economy and Taxation. He argued that free trade broadens diversity and reduces the prices of goods available in a nation, while making a better part of its own resources, knowledge and specialized skills. They cover a wider geographic area, giving signatories a greater competitive advantage. All countries also give themselves the status of the most favoured nation – and grant the best conditions of mutual trade and the lowest tariffs. While NAFTA does not respect everything its supporters had promised, it remained in place. Indeed, in 2004, the Central American Free Trade Agreement (CAFTA) extended NAFTA to five Central American countries (El Salvador, Guatemala, Honduras, Costa Rica and Nicaragua). In the same year, the Dominican Republic joined the group in signing a free trade agreement with the United States, followed by Colombia in 2006, Peru in 2007 and Panama in 2011.
The Trans-Pacific Partnership (TPP), signed on October 5, 2015, represented an extension of NAFTA to a much larger extent. The creation of free trade zones is seen as an exception to the most privileged principle of the World Trade Organization (WTO), since the preferences of the parties to the exclusive granting of a free trade area go beyond their accession obligations.  Although GATT Article XXIV authorizes WTO members to establish free trade zones or to conclude interim agreements necessary for their establishment, there are several conditions relating to free trade zones or interim agreements leading to the creation of free trade zones. There are pros and cons of trade agreements. By removing tariffs, they reduce import prices and consumers benefit from them. However, some domestic industries are suffering. They cannot compete with countries with lower standards of living. This allows them to leave the store and make their employees suffer.
Trade agreements often require a trade-off between businesses and consumers. Since WTO members are required to communicate their free trade agreements to the secretariat, this database is based on the official source of information on free trade agreements (called the WTO-language regional trade agreement). The database allows users to obtain information on trade agreements that are communicated to the WTO by country or theme (goods, services or goods and services).