Watch details Watch details Presentationof lessons learnedby region The environment:our primary collective challenge Irrespective of the region of the world our participants are from, they all see the issue of the environment as the primary collective challenge that needs to be addressed. Human behaviors relating to discrimination, inequalities, and selfishness are also found in the top five in every region. Obsolete educational systems were a recurring theme in contributions from Latin America and the Caribbean, the Middle East and North Africa, Sub-Saharan Africa, and South Asia.