Our comrade Peter Emmet Grimes died on August 24, 2021. Grimes received his PhD in sociology in 1995, under the close direction of Chris Chase-Dunn at Johns Hopkins University, analysizing the effects of economic cycles on the rise and fall of individual countries within the world-system. During his time at Johns Hopkins, he worked with Timmons Roberts to secure a National Science Foundation grant to study the effects of greenhouse gases and global climate change in the world-system. He was fascinated with the planet's natural and social evolution and constantly sought a deeper understanding of how these complex systems converged. At the time