Climate change is rapidly reshaping the world despite international efforts to curb the warming trend. At its current pace, climate change will dramatically reshape the landscape by 2050, causing more than a billion people to compete for resources in affected regions. Moreover, the melting of Arctic ice caps will open new maritime routes nearly year-round, shifting global shipping to less secure zones. As fragile regions become unstable and climate change exacerbates conflict drivers, the U.S. must not remain strategically flexible but should prepare for certain variables. Of these variables, three stand out as most concerning for U.S. security and require shifts in strategy: Arctic ice loss, human displacement, and rare earth supplies.