9.2 Trade Wars and Their Impact on International Relations

Economic Protectionism

Trade wars happen when countries impose escalating tariffs and trade barriers against each other, usually to protect domestic industries. Understanding how these conflicts start, escalate, and ripple through the global economy is central to studying modern international conflict.

Trade Wars and Tariffs

A trade war is a cycle of tit-for-tat escalation where countries keep raising tariffs and other trade barriers against each other. The underlying motivation is usually protectionism: the policy of shielding domestic industries from foreign competition.

Countries have several tools for restricting trade:

• Tariffs are taxes on imported goods. They raise the price foreign products pay to enter a market, giving local producers a competitive edge. For example, the U.S. imposed tariffs of up to 25% on imported steel in 2018 to protect American steelmakers.
• Non-tariff barriers restrict imports without using taxes directly. These include complex licensing requirements, strict product standards, or lengthy customs procedures that make it harder and more expensive for foreign goods to reach consumers.
• Subsidies and import quotas round out the protectionist toolkit. Subsidies give domestic producers a cost advantage, while quotas cap the quantity of a specific good that can be imported.

Retaliatory Measures and Their Impact

Retaliatory measures are trade restrictions a country imposes in direct response to another country's protectionist actions. The logic is straightforward: you tax our goods, we'll tax yours.

A clear example is China's response to U.S. tariffs during the 2018–2019 trade war. After the U.S. raised tariffs on Chinese electronics and industrial goods, China imposed retaliatory tariffs on U.S. soybeans, hitting American farmers hard. U.S. soybean exports to China dropped by roughly 75% in late 2018.

The damage from retaliation extends well beyond the targeted industries:

• Supply chain disruption: Companies that source parts from multiple countries face sudden cost increases and delays
• Consumer price increases: Tariffs on imported goods raise prices for everyday products, from electronics to groceries
• Economic uncertainty: Businesses delay investment when they can't predict future trade costs, slowing growth in both countries

This is why retaliation tends to escalate. Each round of tariffs creates new domestic losers who pressure their government to respond, making de-escalation politically difficult.

Global Trade Dynamics

Role of the World Trade Organization (WTO)

The World Trade Organization (WTO) is the main international body that regulates trade between nations. It serves three core functions:

1. Negotiating trade agreements that lower barriers and set common rules
2. Settling disputes through a formal arbitration process when countries accuse each other of violating trade rules
3. Monitoring trade policies to ensure member countries follow their commitments

A key WTO principle is most-favored-nation (MFN) treatment: if you offer a trade advantage to one WTO member, you must offer it to all members. This is meant to prevent discriminatory trade practices.

However, the WTO's effectiveness has eroded in recent years. Reaching consensus among 164 member states with vastly different economic interests is slow. The U.S. has blocked appointments to the WTO's Appellate Body (its appeals court for trade disputes) since 2019, effectively paralyzing the dispute resolution system. This has left countries more willing to act unilaterally.

Global Supply Chains and Trade Imbalances

Global supply chains are networks of suppliers, manufacturers, and distributors spread across multiple countries. A single smartphone, for instance, might contain minerals mined in the Congo, chips fabricated in Taiwan, and assembly done in China before being sold in the U.S. Advances in shipping, communication, and trade liberalization made these complex networks possible and profitable.

Trade wars are especially disruptive to these chains because tariffs on one component can raise costs across an entire production network.

A trade deficit occurs when a country imports more than it exports, meaning money flows out to foreign producers. The U.S. trade deficit with China reached about $\$345$ billion in 2019, a figure that became a major political flashpoint. Persistent deficits fuel accusations of unfair practices, even though economists debate whether deficits are inherently harmful.

Currency manipulation adds another layer of tension. When a country artificially devalues its currency, its exports become cheaper abroad while imports become more expensive at home. China has faced repeated allegations of keeping the yuan undervalued to boost exports, though the evidence has become more contested in recent years.

Nationalist Trade Policies

Economic Nationalism and Protectionism

Economic nationalism prioritizes domestic economic interests over international cooperation. Rather than viewing trade as mutually beneficial, economic nationalists frame it as competition where one country's gain is another's loss.

In practice, economic nationalism translates into protectionist measures: tariffs, subsidies, and import restrictions designed to favor domestic producers. "Buy American" policies, which require government agencies to purchase domestically produced goods, are a classic example. These policies appeal to voters concerned about job losses but often provoke backlash from trading partners who see them as discriminatory.

The tension is predictable: when one country pursues economic nationalism, its trading partners face pressure to respond in kind, creating a cycle that pulls the broader trading system toward confrontation.

Trade Deficits and Retaliatory Measures in the Context of Nationalism

Trade deficits become politically explosive under nationalist leadership because they're easy to frame as evidence that other countries are "winning" at your expense. During the Trump administration, the U.S. trade deficit with China was repeatedly cited as proof of unfair Chinese practices, justifying aggressive tariff action.

This nationalist framing makes escalation more likely for a specific reason: leaders who have publicly committed to "winning" trade disputes find it politically costly to back down. The result is a pattern where:

• One country imposes tariffs, framing them as correcting unfair practices
• The targeted country retaliates to avoid appearing weak
• Both sides escalate because compromise looks like defeat to domestic audiences
• The broader economy suffers as costs rise and uncertainty spreads

The U.S.-China trade war illustrates this dynamic clearly. What began with targeted tariffs on steel and aluminum in early 2018 expanded to cover hundreds of billions of dollars in goods by 2019. Global GDP growth slowed, supply chains were rerouted, and both American consumers and Chinese manufacturers bore significant costs. The conflict demonstrated that once nationalist rhetoric drives trade policy, the economic logic of mutual benefit struggles to reassert itself.