---
title: "Blocking Minorities in Multilateral Negotiation"
description: "Learn how small groups of states can block outcomes they oppose in multilateral bodies, and the leverage, incentives, and procedural strategies used to"
url: "https://modeldiplomat.com/learn/lessons/blocking-minorities"
---

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Blocking Minorities

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Lesson 10 min 20 XP

# Blocking Minorities

How small groups of states can prevent outcomes they oppose — and the strategies to overcome them.

## The Power to Say No

A blocking minority is a group of states large enough to prevent a decision but too small to impose one. In consensus-based systems, even a single state can block. In voting systems, blocking thresholds vary: the UN Security Council requires 9 of 15 votes, so 7 states can block — but any single P5 member (US, UK, France, Russia, China) can veto alone.

Blocking minorities are powerful because multilateral outcomes require agreement — the default if negotiations fail is usually the status quo. This gives conservatives (those favoring inaction) a structural advantage over reformers. Climate negotiations illustrate this: oil-producing states need only delay and weaken agreements, while ambitious states must build majority support for strong action.

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