The free-rider theory... is a formulation arguing that rational actors tend to abstain from collective action insofar as they think others will do their part to achieve some mutually beneficial objective.
On Wednesday, Barack Obama introduced his strategy against Islamic State in Iraq and in Syria: no Americans in combat, but systematic airstrikes. Jean-Claude Allard, specialist in defense and security politics, analyzes this maneuver in light of the United States' current position on Russia. For him, the battle is far from having been won.