The Covid-19 pandemic has brought forth global anxiety about linkages between the environment and society at a fundamental structural level. Earthly Order: How Natural Laws Define Human Life provides an accessible exposition of the latest foundational knowledge on how natural and social systems science can inform planetary crises. Humanity has either tried to conquer or capitulate to natural order, whereas we should be seeking to understand latent structures and patterns that permeate all systems and develop an "earthly order," that is socially functional and sustainable. Current debates in politics often present what should constitute a "world order" while scientists have wrestled with what are fundamental conditions of "natural order." Author Saleem H. Ali provides a synthesis of these debates with practical guidance for the public with a host of current examples around environmental decision-making by consumers, the government, and industry.