Share

The Impact Equation
Hans Stegeman, Chief Economist of Triodos Bank: Rethinking Growth, Economic Systems and GDP
What if the way we think about money is fundamentally wrong? In our latest episode of The Impact Equation, Rafi and Adam sit down with Hans Stegeman, Chief Economist at Triodos Bank - one of the few banks where sustainability isn’t a bolt-on, but the organising principle. Hans’s central critique is this: we haven’t just chosen economic growth - we’ve hard-wired it into everything. Our markets, financial returns, debt system, pensions, and public budgets all depend on the assumption that the economy must keep expanding. The problem is that this version of growth is material by design, and material growth always comes with ecological and social costs. His argument isn’t that progress is bad - it’s that we’ve confused progress with GDP. No amount of “green” investing can fix a system that structurally requires ever-greater extraction, consumption, and future growth just to stay standing. So what does he want to change? Hans calls for an economy, and a financial system, that is less dependent on growth, and that fundamentally success ought to be measured in wellbeing, resilience, and social outcomes, not just economic output. In this episode, Hans challenges us to question our assumptions and what we’ve accepted as “just how the world works”.
More episodes
View all episodes

71.71. 70up
24:20||Season 1, Ep. 71.71In their latest wash up episode, Adam and Rafi reflect on recent episodes to explore how systemic change happens at a local and global level. They discuss the "triumph of place-based localism" through Simon Case’s work in Barrow and Claudine Blamey’s community-led flood resilience at Aviva, emphasizing that impact is most effective when rooted in the reality of people's lives. They examine the power of "harnessing capitalism for climate," contrasting Alyssa Gilbert’s focus on scaling innovation at Imperial with Luke Leslie’s investor-led approach to carbon markets and nature-based assets. The conversation also highlights the human side of leadership, from Madlin Sadler’s evidence-based humanitarian work at the IRC and Edward Timpson’s navigating of complex legislative systems for children's services, to Ed Davey’s "clear-eyed hope" regarding international cooperation and land use.
71. Rhea Yadav: 7m users in 40 countries
41:08||Season 1, Ep. 71This is the first episode in our second series, Scaling Tomorrow's Social Unicorns, with 100x Impact. Rhea Yadav leads impact and strategy at Wysa, the AI-led mental health platform that has supported more than 7 million people across 95 countries. She founded the organisation’s impact business and now works across governments, health systems, NGOs and employers to take evidence-based mental health support into places where care is scarce.
70. Madlin Sadler: Delivering humanitarian relief across 40 fragile countries
35:50||Season 1, Ep. 70What does it really take to deliver humanitarian aid in the world’s most fragile places? In this episode of The Impact Equation, we sit down with Madlin Sadler, Chief Operating Officer at the International Rescue Committee - an organisation working at the sharpest edge of conflict, disaster and displacement.Madlin offers a rare, inside view of what it means to operate in over 40 of the world’s most crisis-affected countries; where systems have broken down, need is accelerating, and resources are shrinking. Madlin shares what it looks like to deliver vaccines to children in remote conflict zones; how humanitarian organisations make impossible decisions when funding is cut; why evidence, cost-effectiveness, and scale matter when lives are at stake; and why, despite everything, she still feels lucky to do this work.
69. Edward Timpson: how 87 foster children shaped a future Minister
48:33||Season 1, Ep. 69Edward Timpson is the former Children’s Minister, part of the family behind Timpson, and brother of Lord James Timpson, now a Labour prisons minister. In this conversation with Rafi’s former Ministerial boss, Edward reflects on growing up in a family that fostered more than 80 children, alongside one of the UK’s best-known family businesses, recognised for both its high street services and a culture built on trust, kindness and second chances. That experience shaped everything that followed: family law, politics, reform in government, and his work today across children’s services and family care. Edward’s life and career show what stability, love and belief can do in a child’s life. This is an episode about childhood, public service, fostering, politics, and the decisions that can alter a life’s direction.
68. Luke Leslie: investing in Myanmar mangroves, Sub-Saharan stoves & European soil
36:53||Season 1, Ep. 68Luke Leslie is the co-founder and CEO of Key Carbon, investing directly into businesses generating high integrity carbon credits, from clean cooking stoves in sub-Saharan Africa to regenerative agriculture in Europe and mangrove restoration in Myanmar. Luke explains how Key Carbon has borrowed from royalty and streaming models used in mining, then adapted them for carbon markets. The result is a more hands-on and structured approach that is attracting hundreds of millions of dollars of institutional finance into nature investment.
67. Claudine Blamey: from fleeing Iran to the boardroom of British business
38:09||Season 1, Ep. 67In this episode, Rafi sits down with Claudine Blamey, Chief Sustainability Officer at Aviva. Claudine’s story starts far from the boardrooms of British business. She arrived in London from Tehran as a child, speaking no English. That experience shaped a mindset that has stayed with her throughout her career: nothing is forever, and even the most complex situations can be navigated. Three decades later, Claudine has helped shape sustainability strategy across sectors – from sustainable buildings at British Land to aviation’s first net-zero strategy at easyJet, and now climate and nature strategy at Aviva. In this conversation, she reflects on how her early experiences of migration shaped her resilience and leadership; why insurers have a unique role in managing and pricing climate risk; the growing reality that parts of the UK could become uninsurable due to climate impacts; Why nature restoration could become a major global asset class; And, how sustainability leaders are shifting from ambition-setting to systemic change.
66.66. Summer Kennedy: backing the world's best tech non-profits with FFwd
25:37||Season 1, Ep. 66.66This episode we're joined by Summer Kennedy for a special episode looking back at our first series with Fast Forward. In this series, we’ve featured three amazing entrepreneurs backed by Fast Forward, a trailblazing accelerator backing tech nonprofits solving urgent, global problems at scale. Summer quite literally drives Fast Forward forward; shaping the strategic vision and building the systems that get the organisation there. Her path to leadership has been anything but linear: from teaching first grade in Oakland to spearheading tech-for-good initiatives, Summer’s career proves that the most impactful journeys don’t follow a straight line. We reflect on three conversations with Fast Forward investments - Sunny Patel of Vector Cam, Alysia Garmulewicz of Materiom and Michelle Brown of CommonLit.
66. Ed Davey: from Clarence House to the rainforest
37:50||Season 1, Ep. 66This episode we're not joined by Ed Davey, the leader of the Liberal Democrats, but a pioneer on forests, agriculture and food security who has worked all over the world, from Tibet to Yemen and Colombia. With roots in social justice and anti-poverty campaigning, Ed cut his teeth in efforts around debt, poverty, and development with organisations like Oxfam and the wider Make Poverty History movement before joining the then Prince of Wales – now King – to drive high-level work on forests, sustainable agriculture, and climate through his International Sustainability Unit. Since then, Ed has become a driving force in the world of sustainable food, nature and climate, helping drive the work of the World Resources Institute and advising the Food and Land Use Coalition and its push to transform how the world grows and eats.
65. Lord Simon Case: from Boris to Barrow
51:03||Season 1, Ep. 65Lord Simon Case served four British Prime Ministers as head of the UK's civil service from Boris Johnson in 2020, to Liz Truss, Rishi Sunak and Sir Keir Starmer. Lord Case held the most senior civil service role just as the government hit a run of shocks: Brexit implementation, Covid, war in Europe, economic turbulence, and rapid technological change. In this episode, he’s candid about what it feels like at the centre of crisis decision-making, and why government too often drifts into a self-obsessed “bubble” that’s disconnected from daily life. He also shares what gave him hope: meeting frontline civil servants, and seeing what changes when power and money are tied to real places. We talk about Barrow Rising; a place-based partnership bringing central government, local government, industry and community together around the long-term transformation of Barrow-in-Furness. What does it take to turn billions of public spend next door into better health, education, and opportunity? And can Barrow become a blueprint others can borrow from?