The authors argue that centuries of imperialism, extractive capitalism, and population growth have pushed Earth's ecosystems beyond their limits, and created a broadening pattern of social inequality. The review summarizes the grave threats facing the planet but rejects a "doom and gloom" philosophy. Instead, the authors argue, the threats should motivate swift and substantial actions.

According to the authors, a global economic model focused on wealth accumulation and profit, rather than true sustainability, is a major impediment to decarbonization, conserving natural resources, and ensuring social equity. Therefore, the authors argue, governments should enforce radical, immediate cuts in fossil fuel use, eliminate environmentally harmful subsidies, and restrict trade that generates pollution or unsustainable consumption.