We need open source now, more than ever. The world is in crisis: Corona pandemic, recent flooding disaster in South Asia, climate change, political threats, inequality. Open source could be a solution to many problems of our time because only by working together we can make bigger strides in solving some of the most critical global issues. People from around the world work together on open source projects. They show every day how a fruitful and successful collaboration on a global scale is possible despite different views, personal and historical backgrounds and experiences. In this session, Hong Phuc Dang will share successful examples from communities to governments, at the same time outline challenges and how each and everyone of us can play a role in sustaining the open source ecosystem and the world.