The Sahel region of Africa is a semi-arid, arc-shaped landmass that stretches 3,860 kilometres from Senegal across portions of Mali, Burkina Faso, Niger, Nigeria, Chad, and even Sudan. It is also the most neglected and conflict-ridden part of the planet, according to the Norwegian Refugee Council.

Last month, as global leaders met in Lisbon for the UN Oceans Conference, President Biden signed a National Security Memorandum to address the challenge of illegal, unreported and unregulated (IUU) fishing. This event is a promising sign that the U.S. and other governments are accelerating the response to the threat that IUU fishing poses—not just to the environment, the economy and human rights, but also to global peace and security.

As climate change worsens, the once-unimaginable power to use technology to cool the planet—a method known as “solar geoengineering”—has quietly entered the realm of possibility. Yet the prospect of developing such planet-altering technologies has launched an intense debate: Can this be achieved responsibly? Should it be attempted at all?

My latest book—States and Nature: The Effects of Climate Change on Security (Cambridge University Press)—has been more than two decades in the making. And as I reflect on that journey, I see significant parallels between my own trajectory and the larger efforts to define and refine thinking about climate security.

The harm that comes to the environment during armed conflict is often permanent, yet the lack of advocates to fight for its protection as they happen creates a deafening stillness. Indeed, this state of affairs has led to the environment to be seen as the “silent victim of war.” Vietnam, Kuwait, Syria, Afghanistan, Ukraine, and several more nations have been permanently damaged due to the destruction of the environment during armed conflict which can persist long after hostilities have ceased.

In Iraq, climate change is adding stress to an already precarious situation. Weak public services,  growing unemployment, fossil fuel-related environmental and health hazards, and other factors have generated high levels of social vulnerability and contributed to recent protests. In the top post for May, Dylan O’Driscoll and Shivan Fazil write about how, against this fragile backdrop, insecurity is heightened by increasingly deadly flash floods and more frequent dust storms that pose a public health threat.

In an increasingly unpredictable world of pandemics, conflict, and disasters, climate change is often at the center of conversations about the instability of global affairs. From California wildfires to droughts across East Africa, the role of climate cannot be ignored in any analysis of global unpredictability. And citizens around the world know it. Growing global public support for governments to aggressively act on climate change has led to an increase in policy action on climate issues.

The massive floods, heat waves, raging wildfires, and devastating droughts of 2021 brought the present reality of climate change’s catastrophic impacts on people and ecosystems home to our doorsteps.