This Changes Everything: Capitalism vs. the Climate is Naomi Klein's fourth book; it was published in 2014 by Simon & Schuster. Klein argues that the climate crisis cannot be addressed in the current era of neoliberal market fundamentalism, which encourages profligate consumption and has resulted in mega-mergers and trade agreements hostile to the health of the environment.

Naomi Klein is a Canadian author, social activist, and filmmaker known for her political analyses; support of ecofeminism, organized labour, criticism of corporate globalization, fascism and capitalism. As of 2021, she is an associate professor, and professor of climate justice at the University of British Columbia, co-directing a Centre for Climate Justice.