The climate crisis is fundamentally and irreparably reshaping our world, with grave implications for the rights of current and future generations of children. When ranked by income, the top 50% of states are responsible for 86% of cumulative global CO2 emissions, while the lower half are responsible for just 14%. Despite this, it is the children of low and middle-income countries that bear the brunt of losses and damage to health and human capital, land, cultural heritage, indigenous and local knowledge, and biodiversity as a result of climate change. Without drastic mitigation action to reduce emissions and limit warming to 1.5°C above pre-industrial levels, led by high-income and high-emitting countries and informed by children’s best interests and identified priorities, the children of these low- and middle-income countries will be burdened with the most dangerous impacts of the climate crisis. They have inherited a problem not of their own making.