October 21 International Public Call | with Roger Hallam and Ruth Cerezo Mota

Start: 2026-10-21 19:00:00 UTC British Summer Time (GMT+01:00)

Event Type: Virtual
A virtual link will be communicated before the event.

Banner image with the two speakers and the text "4 Billion Dead" in the centre

You felt this summer. Across the world it was felt.

The heat that didn’t break. The grass that turned to straw then dust. The rivers running low. Heatwaves killing thousands of people.

It will get worse. Not might. Will. Every year temperatures will rise and more people will die.

Last year the truth came out. The British insurance industry produced a report on the climate crisis, predicting at least 4 billion deaths at 3C of global warming - possible by mid century.

4 billion. Half the Earth’s population. Dead.

Sit with that number for a moment. There are no words.

We are not here to persuade you. We are here to say we need face this together. To ask what a life of integrity looks like knowing what we now know.

A new social movement is starting, set up by people who have run the biggest UK campaigns of the past decade. If you are feeling disillusioned with societies ability to deal with a future that is now locked in to some degree, then come to along to the next 4 Billion Dead International Public Call. Come and hear how a group of people are attempting to foster a culture that is just a little bit different.

Speaker 1 - Ruth Cerezo Mota - Climatologist and climate modeller at the National Autonomous University of Mexico (UNAM). She specializes in regional climate modelling, precipitation, extreme rainfall, droughts, heat waves, and climate change. She was a Lead Author of Chapter 8 ("Water Cycle Changes") of the IPCC's Sixth Assessment Report (AR6), Working Group I, which deals with the physical science of climate change.

Speaker 2 - Roger Hallam - Co-founder of some of the most prominent social movements in recent UK history, Roger has been committed to social justice for decades. He was a researcher in the science of mass mobilisation at Kings College London and is the founder of The 4 Billion Dead Project.

Date
: Wednesday, 21st October, 2026
Start Time: 7PM UK
End time: 8:30pm UK

Be there. Listen. Feel. Act.

Thank you

Roger Hallam
Co-Founder of Extinction Rebellion, Just Stop Oil and Insulate Britain
Films, articles and podcasts available at rogerhallam.com

Discover more about 4 Billion Dead. Visit our website at https://4billiondead.org/
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