What does it actually take to align every dollar of a foundation's endowment with its mission — and what does that teach us about the future of sustainable finance?

In this TBLI Talk, Robert Rubinstein sits down with Clara Miller — one of the most influential and original thinkers in the history of impact investing and nonprofit finance. Over four decades spanning the founding of the Nonprofit Finance Fund in 1984, through her presidency of the Heron Foundation from 2011 to 2017, Clara has done something very few people have done: she has actually changed how money works in the social sector. Under her leadership, Heron became one of the first foundations in the world to invest 100% of its endowment — every dollar — in alignment with its antipoverty mission. Her radical truth: the way funders and foundations deploy capital routinely damages the organisations they intend to help. Most of the leverage to fix this is not in the management practices of nonprofits. It is in the financial practices of funders.

In this episode:

• What it took to move the Heron Foundation from 40% to 100% mission-aligned investment — and what it revealed about the gap between intent and practice in philanthropy
• Why deeply ingrained "best practices" in funding often hurt organisations more than they help
• What sustainable finance and impact investing look like when you take accounting and business models seriously — not just values
• Why revenue reliability matters more than capital availability for most social enterprises
• What forty years of social sector finance has taught Clara about what actually works — and what the field is still getting wrong
• How the nonprofit and for-profit sectors can learn from each other on finance, accountability, and mission

The key insight: Cash is king. If the revenue is flowing, the capital will come. Clara Miller has spent 40 years watching funders inadvertently undermine the organisations they care about — through overhead caps, bespoke metrics, restricted grants, and financial practices that would be laughed out of any commercial boardroom. This is her verdict on how to do it better.

⏱️ Episode Guide:

• 0:00 — What 40 years in social sector finance teaches you
• 0:X:XX — How Heron moved to 100% mission-aligned investment
• 0:X:XX — Why funder practices damage nonprofits — and how to fix them
• 0:X:XX — Revenue vs capital: what social enterprises really need
• 0:X:XX — Accounting, business models, and the missing infrastructure of impact
• 0:X:XX — What sustainable finance looks like when it truly works

👤 About Clara MillerClara Miller is President Emerita of the Heron Foundation, which she led from 2011 to 2017, and advises, writes, and speaks on investing and enterprise finance. She founded and was CEO of Nonprofit Finance Fund from 1984 to 2011. Nonprofit Quarterly She is an advisor to the Sustainability Accounting Standards Board, the US Impact Investing Alliance, and the Impact Management Project, and served as a Clinton Administration appointee who chaired the US Treasury's first Community Development Advisory Board. Nonprofit Quarterly She was the inaugural laureate of the Prince's Prize for Innovative Philanthropy awarded by the Prince Albert II of Monaco Foundation, and has received a Rockefeller Bellagio Residency. She has been published in the Financial Times, Stanford Social Innovation Review, and the Nonprofit Quarterly. Philanthropyforum

For anyone working in philanthropy, impact investing, sustainable finance, or nonprofit leadership — this episode is essential listening.

ABOUT TBLI RADICAL TRUTHReal experience. Real results. No greenwashing. TBLI Group is the world's leading ESG and impact investing network — educating, advising, and connecting investors for 25 years.🌐 tbligroup.com

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