Standard $\Lambda$CDM predicts that galaxy clusters should be oriented randomly on the largest scales, or weakly aligned with local filaments. However, observations (the "Binggeli effect") reveal strong, coherent alignments of cluster major axes over vast distances ($>100$ Mpc), far exceeding simulations. This indicates a large-scale mechanism organizing structure that transcends local gravity (Binggeli 1982; West et al. 2017).