The World Social Report 2020 examines the impact of four such megatrends on inequality: technological innovation, climate change, urbanization and international migration. Technological change can be an engine of economic growth, offering new possibilities in health care, education, communication and productivity. But it can also exacerbate wage inequality and displace workers. The accelerating winds of climate change are being unleashed around the world, but the poorest countries and groups are suffering most, especially those trying to eke out a living in rural areas. Urbanization offers unmatched opportunities, yet cities find abject poverty and opulent wealth in close proximity, making gaping and increasing levels of inequality all the more glaring. International migration allows millions of people to seek new opportunities and can help reduce global disparities, but only if it occurs under orderly and safe conditions. Whether these mega-trends are harnessed to encourage a more equitable and sustainable world, or allowed to exacerbate disparities and divisions, will largely determine the shape of our common future.