How International Sanctions Work: Economic Pressure as Foreign Policy

What Are International Sanctions?

International sanctions are economic, financial, or diplomatic penalties imposed by one or more countries (or international organizations) on a target country, entity, or individual to pressure them into changing their behavior — without resorting to military force. They represent the middle ground of foreign policy between diplomatic protests and military action.

Sanctions can target entire economies (comprehensive sanctions) or be precisely targeted at specific individuals, companies, or sectors (targeted or "smart" sanctions). They are among the most frequently used tools of modern foreign policy, with the United States maintaining hundreds of distinct sanctions programs affecting thousands of individuals and entities worldwide.

Who Imposes Sanctions?

United Nations

The UN Security Council can impose legally binding sanctions on all member states through Chapter VII of the UN Charter. UN sanctions carry the broadest legal authority but are limited by the veto power of permanent Security Council members (USA, UK, France, Russia, China) — meaning Russia and China cannot be sanctioned by the Security Council, and each can block sanctions against their allies.

United States

The U.S. imposes sanctions through the Treasury Department's Office of Foreign Assets Control (OFAC) and coordinates with the State and Commerce Departments. U.S. sanctions have global reach beyond American borders through secondary sanctions — threatening to sanction non-American companies that do business with sanctioned entities, forcing third parties to choose between access to the U.S. financial system and business with the sanctioned target.

European Union

The EU imposes sanctions through council decisions requiring unanimous approval from all member states. EU sanctions are significant given the size of the European market and the euro's role in global trade.

Other Countries

The UK, Canada, Australia, Switzerland, and others maintain independent sanctions regimes, often coordinating with allies for maximum effect.

Types of Sanctions

Comprehensive Trade Embargoes

Broad prohibitions on virtually all trade and financial transactions with a target country. The U.S. embargo on Cuba (in place since 1962) and the sanctions on Iran and North Korea are the most extensive current examples.

Targeted (Smart) Sanctions

Asset freezes and travel bans imposed on specific named individuals (typically senior government officials, oligarchs, military commanders) and entities rather than entire populations. Developed in the 1990s in response to criticism that comprehensive sanctions harmed civilian populations while often strengthening authoritarian regimes.

Sectoral Sanctions

Target specific industries or sectors — restricting access to finance, technology, or trade in specific sectors (energy, defense, financial services) rather than all economic activity.

Financial Sanctions and SWIFT

Cutting off banks from the international financial messaging system SWIFT (Society for Worldwide Interbank Financial Telecommunication) effectively isolates a country from most international financial transactions. Russia was partially cut off from SWIFT following the 2022 invasion of Ukraine — a significant escalation that illustrated both the power and the limitations of financial sanctions.

How Sanctions Work in Practice

Sanctions impose costs on targets through several mechanisms:

• Restricting imports of goods the target economy needs (technology, medicine, fuel)
• Blocking exports, cutting off foreign exchange earnings
• Freezing assets held abroad, cutting off access to foreign financial markets
• Preventing access to international banking and payment systems
• Isolating senior officials through travel bans and asset freezes

These costs are intended to change the target's calculation — making the sanctioned behavior more costly than the sanctions themselves.

Do Sanctions Work?

The effectiveness of sanctions is genuinely contested. Academic research suggests mixed results:

• Sanctions are most effective when the sanctioning coalition is broad, the economic interdependence is high, the political goal is modest, and the sanctioned country's government is susceptible to domestic political pressure.
• Comprehensive sanctions often fail to achieve major political goals — Cuba has been under U.S. embargo for over 60 years without the intended regime change; Iran has maintained its nuclear program despite severe sanctions.
• Targeted smart sanctions appear more effective at imposing costs on elites while limiting civilian harm, but the evidence for behavior change is still limited.
• Sanctions can have unintended effects: rallying domestic populations around the government ("rally around the flag"), accelerating efforts by sanctioned states to develop domestic alternatives to sanctioned goods, and fostering sanctions evasion through third parties.

The Russia Sanctions Case Study

Following Russia's invasion of Ukraine in February 2022, the U.S., EU, UK, Canada, Australia, Japan, and others imposed an unprecedented package of sanctions:

• Freezing approximately $300 billion of Russian central bank reserves held abroad
• Removing major Russian banks from SWIFT
• Banning export of advanced technology (semiconductors, aerospace components)
• Targeted sanctions on hundreds of oligarchs, officials, and entities
• Oil price cap mechanisms to reduce Russian oil revenue

Russia's economy contracted significantly but proved more resilient than initially expected, partly due to record oil revenues in 2022 (elevated by the same war the sanctions were meant to stop), large-scale sanctions evasion through third countries (India, China, UAE), and rapid domestic adjustment. The case illustrates both the power and limits of economic sanctions.

Humanitarian Concerns

Comprehensive sanctions disproportionately harm civilian populations rather than ruling elites who retain access to luxuries regardless of sanctions. The Iraqi sanctions of the 1990s are the most cited example — estimated to have contributed to hundreds of thousands of civilian deaths, particularly children, through shortages of medicine and food. This catastrophe drove the shift toward targeted smart sanctions in the late 1990s and 2000s, though the humanitarian calculus remains difficult.