This article has been updated to reflect news developments.

President Trump’s announcement Friday night that the United States, France and Britain had launched airstrikes against Syria in response to a chemical weapons attack might have surprised the people who listened to him campaigning in 2016, when he repeatedly critiqued “stupid” Middle Eastern interventions.

Yet since entering office, Mr. Trump has reversed course. He evidently shares the assumption that America must do something in response to atrocities in Syria — a wholehearted embrace of the Washington bias toward action.

In this, Mr. Trump and his predecessor have something in common: Both he and Barack Obama came into office promising to change America’s foreign policy, but when faced with crises, both yielded to pressure to intervene. This bias toward action is one of the biggest problems in American foreign policy. It produces poorly thought-out interventions and, sometimes, disastrous long-term consequences, effects likely to be magnified in the era of Mr. Trump.

The concept of a bias for action originated in the business world, but psychological studies have shown a broad human tendency toward action over inaction. Researchers have found that World Cup goalkeepers, for example, are more likely to dive during a penalty kick, though they’d have a better chance of catching the ball by remaining in the center of the goal.