Bertha K. Madras

Professor of Psychobiology, Department of Psychiatry, Harvard Medical School; Member, President’s Commission on Combating Drug Addiction and the Opioid Crisis

G20 (Group of Twenty)

What Does the G20 Do?
The Group of Twenty, an informal gathering of many of the world’s largest economies, is the premier global forum for discussing international economic issues. Its 2025 summit marks the first time the forum is hosted in Africa, but questions loom about the group’s continued relevance. 

by CFR Editors November 18, 2025

Climate Change

Paris to Kyoto: The History of UN Climate Agreements
International efforts, such as the Paris Agreement, aim to reduce greenhouse gas emissions. But experts say countries aren’t doing enough to limit dangerous global warming.

by Lindsay Maizland and Clara Fong November 6, 2025 Renewing America

Sudan

What Is the Extent of Sudan’s Humanitarian Crisis?
More than two years into the civil war in Sudan, about twelve million people have been forcibly displaced. Yet experts say the country’s devastating humanitarian crisis is still not getting the international attention it deserves.

by Mariel Ferragamo and Diana Roy November 6, 2025

Top Stories on CFR

United States

The Road From Africa’s G20 Summit to Trump’s ‘America First’ Priorities
The forum in South Africa shined a light on pressing realities faced by the continent. It may also have laid the groundwork for the G20 summit Trump will host in Florida next year.

by Heidi Crebo-Rediker November 24, 2025 Greenberg Center for Geoeconomic Studies

Saudi Arabia

The Business of U.S.-Saudi Diplomacy
CFR President Michael Froman analyzes the outcomes of this week’s meeting between the United States and Saudi Arabia.

by Michael Froman November 21, 2025

United States

Putin’s Nuclear Offer: How to Navigate a New START Extension
The United States should not fall for Putin’s gambit to undercut Ukraine. Before agreeing to an extension, it must secure greater verification guarantees and a commitment to further negotiations.

by John Drennan and Erin D. Dumbacher November 19, 2025 National Security and Defense Program