Mr. Sim is a change-maker at the system level. He broke the taboo around toilets by bringing the sanitation crisis to the global media spotlight since 2001. Sim mobilized a global movement involving governments, policy makers, United Nations agencies, international civil society, thought leaders and activists to work together in addressing the global sanitation crisis. He is the founder of the World Toilet Organization, which founding day (November 19) is now enshrined by all 193 countries of the UN General Assembly as the official World Toilet Day. He also founded Bottom of the Pyramid (BoP) Hub, a business-centric organization using hybrid cross-sector collaborations to alleviate poverty sustainably through creating efficient BOP marketplace for the 4 Billion poor.