Chapter I: Sufficiency Economy in the Post-COVID-19 World -- Seven Systemic Divides -- One world, one destiny -- Systemic structure and mental model -- The new normal in the post-COVID-19 world -- Seven systemic divides -- Seven Major Shifts -- Rethinking our assumptions -- Seven major shifts -- Post-COVID-19 global landscape -- Sufficiency Economy Philosophy and Post-COVID-19 Sustainable Development -- Balanced development at multiple levels -- Dawn of 'sustainism' -- Chapter II: 'We-Society' in the Post-COVID-19 World -- Thriving in Balance in the Post-COVID-19 Society -- The Emergence of Post-COVID-19 Society -- Industrial society -- Digital society -- Post-COVID-19 society -- Social Contract in the 'We-Society' -- 'Prosperity for all' in the 'we-society' -- Connecting people in the post-COVID-19 world with 'trust' -- 'Seven testaments' supporting the 'we-society' -- New Life after COVID-19 -- Seven wonders from within -- Post-COVID-19 mindset -- Chapter III: Thailand's National Agenda Framework in the Post-COVID-19 World -- Thailand's national strategy blueprint -- Prime minister's agenda -- Thailand's new sustainable growth engine: BCG economy model.