Meet our Advisory Board


The Human Act and Millionaires for Humanity Advisory Board will support our work with insight, relation-building, and strategic advice in order to create a systemic change towards worldwide wealth taxation.

Get to know our nine members here.


Nyaradzayi Gumbonzvanda

The chair of the board is Nyaradzayi from Zimbabwe, a global thought leader on issues of economic and social justice, human rights, and peace. She is a trained human rights lawyer with extensive experience in conflict resolution and mediation. Nyaradzayi is the Founder and Chief Executive of Rozaria Memorial Trust and an African Union Ambassador working on ending child marriage. In addition to being the chair of our advisory board, Nyaradzayi is also the chair of the Action Aid International Board & Federation.

Sasja Beslik

Sasja is an international finance expert known for promoting financial sustainability across the world. He is a Danish-Swedish refugee from Bosnia and Herzegovina with a degree in economics and journalism from Stockholm University. As a journalist, he has covered wars and humanitarian crises for the Red Cross from 1998 to 2000. With 20 years of international experience in advising and working with multinational companies on investment issues, he became the Head of Sustainable Finance at Nordea In 2017. Currently, Sasja is a Senior Executive in Sustainable Finance at Bank J. Safra Sarasin in Switzerland.

Bridget Kustin

Bridget is an economic anthropologist from the UK/USA whose research, teaching, and employment over the past 16 years focuses on inequality and social justice in global contexts. She has a Ph.D. from Johns Hopkins University and is a Research Fellow at Saïd Business School at Oxford University. Here she is working on examining the global wealth spectrum including large family businesses through The Ownership Project. Bridget has worked in Bangladesh, Germany, India, Pakistan, the UK, and the US, and conducted academic research in 15 additional countries. Bridget is a behavioral expert and has consulted for the Bill and Melinda Gates Foundation’s Financial Services for the poor division, and Islamic Relief Worldwide.

Antonis Schwarz

Antonis is an impact investor, philanthropist, and activist of Greek-German descent and the heir of a German pharmaceuticals company. He is a proud member of the Millionaires for Humanity and TaxMeNow networks, using his privilege as a wealth holder to actively advocate for tax justice. As a strong believer in the power of activism, he founded the Guerrilla Foundation in 2016 to support progressive social movements and activists working towards bringing about major systemic change across Europe.

Miriam Plon Sauer

Miriam is a Danish award-winning brand and communications strategist with a proven track record of building brands that add value. She is a thought-leader on the ability and responsibility for brands and companies to have a positive impact in the world, Miriam has extensive experience with positioning and repositioning of everything from established international brands, scale-ups, start-ups, and NGOs. Currently, Miriam is the Executive Strategy Director at AKQA EMEA leading brand strategy and creative work for global brands and organizations.

Virgilio Viana

Virgilio is a Brazilian forest engineer and one of Brazil’s leading experts on forestry, environment, and sustainable development. He served as Brazil’s Secretary of State for Environment and Sustainable Development from 2003-2008 and is currently the Director-General of the Amazonas Sustainability Foundation. He has a Ph.D. in Biology from Harvard University and a post-doc in sustainable development from Florida University. Virgilio is also the chair of the UN’s Sustainable Development Solutions Network for the Amazons and the founder of Amazon COVID Alliance.

Alice Krozer

Alice is an inequality expert with roots in Mexico and Germany. Her research interests include the study of elites and privilege, discrimination and racism, and perceptions of inequality. Currently, she is working as a professor at the Center for Sociological Studies at El Colegio de México, with a Ph.D. in Development Studies from the University of Cambridge. She holds degrees from the London School of Economics and Copenhagen Business School, and has been a visiting researcher at Stanford University and Pontificia Universidad Católica de Chile. Alice has previous experience as a consultant for UN ECLAC, Oxfam, among others.

Rafael Wildauer

Rafael is an economist from UK and Austria. His work is focused on the distribution of income and wealth and is the co-author of the “A European Wealth Tax Policy Study” report published in 2021. Rafael is a Senior Lecturer in Economics at the University of Greenwich in London where he is a member of the Institute for Political Economy, Governance, Finance and Accountability (PEGFA) and the Economics and International Business Department. He holds a Ph.D. in Economics from Kingston University and completed a Bachelors and Masters’s degrees in Economics at the University of Vienna.