The document discusses US interventions overseas that often begin as humanitarian efforts but end up lasting much longer and costing more than initially estimated. It provides examples of interventions in Somalia, Iraq, Afghanistan, and Libya that were presented as limited humanitarian or counterterrorism missions but evolved into prolonged wars. The document also examines why the US continues these interventions, arguing it is largely due to fears of terrorist attacks on American soil and a view that perpetual warfare overseas prevents attacks at home. It notes rising anti-Western sentiment and terrorism as unintended consequences of US interventionism.