World leaders fight terrorism all the time, with summit meetings and sound bites and security initiatives. But they have studiously ignored one of the most common and brutal varieties of terrorism in the world today.

This is a kind of terrorism that disproportionately targets children. It involves not W.M.D. but simply AK-47s, machetes and pointed sticks. It is mass rape  and it will be elevated, belatedly, to a spot on the international agenda this week.

The United Nations Security Council will hold a special session on sexual violence this Thursday, with Condoleezza Rice coming to New York to lead the debate. This session, sponsored by the United States and backed by a Security Council resolution calling for regular follow-up reports, just may help mass rape graduate from an unmentionable to a serious foreign policy issue.

The world woke up to this phenomenon in 1993, after discovering that Serbian forces had set up a network of “rape camps” in which women and girls, some as young as 12, were enslaved. Since then, we’ve seen similar patterns of systematic rape in many countries, and it has become clear that mass rape is not just a byproduct of war but also sometimes a deliberate weapon.