The 2015 Global Forecast by CSIS highlights the complexities of U.S. foreign and defense policy amidst a backdrop of global crises, notably the threats from ISIS and the Ebola virus. The document discusses the political dynamics affecting defense budgets, revealing a lack of consensus on sustained international commitment among U.S. political parties. It emphasizes the need for effective deterrence strategies and partnerships to navigate contemporary security challenges, as well as the importance of bipartisan support for U.S. leadership in the world.