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September 12, 2026Short & citedBlog
Civic Viewpoint.
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Money & Work • Trade

Trade war

A trade war is an economic conflict in which countries impose tariffs or other trade barriers on one another in retaliation.

Updated September 12, 20261 min readCited sources

A trade war is an economic conflict in which countries impose tariffs or other trade barriers on one another in retaliation. It is usually associated with protectionist policies intended to shield domestic industries, but it can also raise consumer prices, disrupt trade, and weaken economic growth.

What it is

A trade war is a situation in which countries raise tariffs or other trade barriers against one another. The term is used in economics and politics to describe a cycle of retaliation in trade policy.

Why it matters

Trade wars can raise the cost of imported goods, reduce consumer choice, and disrupt supply chains. They may also increase market volatility and create wider economic harm for both sides. For Canada, a major trading nation, trade wars can directly affect sectors tied to the United States and other global markets.

How it starts

Trade wars commonly arise from protectionist policies, disputes over subsidies, dumping, market access, intellectual property, or national security concerns. Governments often impose barriers they believe will protect local industries or pressure trading partners.

In short

  • Trade wars involve reciprocal trade barriers, especially tariffs, between countries.
  • They often begin when one country tries to protect domestic industries or responds to perceived unfair trade practices.
  • Retaliation can lead to escalating costs for imports and exports.
  • Trade wars can disrupt supply chains and broader international trade relations.
Canadian angle

Trade wars matter to Canadian readers because Canada is a major trading nation and can be affected by foreign tariffs, retaliatory measures, and supply-chain disruptions, especially in sectors tied to the United States and other global markets.

Quick questions

What is a trade war?
A trade war is an economic conflict in which countries impose tariffs or other trade barriers on each other, usually in retaliation.
What usually causes a trade war?
Trade wars usually begin when a country tries to protect domestic industries or responds to perceived unfair trade practices by another country.
What are the effects of a trade war?
Trade wars can raise prices, reduce consumer choice, disrupt supply chains, and hurt trade and growth in both countries.

Sources

  1. Johnson & Wales University Onlinehttps://online.jwu.edu/blog/what-trade-war/
    Supports: Definition of trade war, common tools such as tariffs and quotas, and effects such as inflation and retaliation.
  2. Cambridge Dictionaryhttps://dictionary.cambridge.org/us/dictionary/english/trade-war
    Supports: Concise definition of trade war as a situation where countries raise import taxes and quotas to protect their economies.
  3. Encyclopaedia Britannicahttps://www.britannica.com/money/trade-war-meaning
    Supports: Trade barriers, retaliation, higher costs, and WTO role in reducing barriers and promoting stability.
  4. Encyclopaedia Britannicahttps://www.britannica.com/topic/trade-war
    Supports: Retaliatory tariff cycles and the tendency of trade wars toward economic self-sufficiency and limited trade.