April 27, 2009 Wiek, A., and S. van der Leeuw. 2009. Transformative Governance for Global Change. IHDP 7th Open Meeting 2009, Bonn, Germany (April 27-30, 2009). Home ยป Wiek, A., and S. van der Leeuw. 2009. Transformative Governance for Global Change. IHDP 7th Open Meeting 2009, Bonn, Germany (April 27-30, 2009).