Author and activist Ayaan Hirsi Ali proposes that an effective tool to challenge radical Islamist ideology would be to actively convert Muslims to Christianity.

"If we don't compete, we run the risk of living in a global order where the radical Muslims win the hearts and minds simply because there's no one else competing with them," she says.

Author and activist Ayaan Hirsi Ali proposes that an effective tool to challenge radical Islamist ideology would be to actively convert Muslims to Christianity.

"If we don't compete, we run the risk of living in a global order where the radical Muslims win the hearts and minds simply because there's no one else competing with them," she says.