Could the United States stay out of World War I?

Could the United States have remained outside World War I, and what would follow?

Yes, but accepting continued ship losses would undermine U.S. credibility and its claim to great-power status.

The United States could choose not to enter, but continued German attacks on American shipping would make restraint increasingly costly. After Washington issued public warnings, repeated unanswered sinkings would suggest that it could not defend its declared interests. The reputational effect is compared to a heavyweight boxer walking away from a public challenge in front of cameras: the decision may avoid one fight but changes how every later opponent judges the actor. A state identified as a great power is especially exposed to that kind of testing. Entry was therefore not mechanically inevitable, but neutrality carried deterrence and credibility consequences that could make later conflict more likely.