By Nicholas Kristof for the New York Times.

LUCKNOW, India — FOR as long as anyone can remember, upper-caste men in a village here in northern India preyed on young girls. The rapes continued because there was no risk: The girls were destroyed, but the men faced no repercussions.

Now that may be changing in the area, partly because of the courage of one teenage girl who is fighting back. Indian law doesn’t permit naming rape victims, so she said to call her Bitiya — and she is a rapist’s nightmare. This isn’t one more tragedy of sexual victimization but rather a portrait of an indomitable teenager whose willingness to take on the system inspires us and helps protect other local girls.

“If he raped her, he probably likes her,” explained Shiv Govind, an 18-year-old.

I’m on my annual win-a-trip journey, in which I take a university student along on a reporting trip to the developing world. The winner, Austin Meyer of Stanford University, and I see in Bitiya a lesson for the world about the importance of ending the impunity that so often surrounds sexual violence, including in the United States.