The arrest of two female would-be suicide bombers in Jakarta in December 2016 shows the desire of Indonesian women for a more active role in violent extremism. It may be a reflection of the pro-ISIS movement’s weakness that male leaders are more willing to oblige them than in the past, but the initiative has come from the women. Indonesian women’s increasing willingness to organise social media groups, set up fund-raising charities and provide various forms of logistical support for the pro-ISIS movement shows that this is not just men exploiting vulnerable women – though that also takes place – but...