Natural disasters and conflicts jeopardize the health of millions of women and adolescent girls every year. While remarkable progress has been achieved during the past decade protecting the health and rights of women and adolescent girls in humanitarian settings, the growth in need has outstripped the growth in funding and services. Yet, these services are of critical importance, especially for very young adolescent girls, who are the most vulnerable and least able to confront the many challenges they face, even in stable times. The State of World Population 2015 describes the impact of crises on women and girls and proposes a transformative agenda for the future