In cases of prolonged ethno-nationalist conflicts, children will often grow up in extreme conditions of poverty, violence, and routinized harassment. As they mature, many of the children begin their involvement with terrorist movements in largely support roles: throwing stones at demonstrations, lookouts, ferrying messages, or smuggling weapons. The terrorist organizations create separate units for children to involve them at a young age and use the youth movements as a testing ground to spot talent. Individual children are understood to be nested within layers of a social ecology, including family, society, and culture; the transactions between these layers informs child development and may make certain children more at risk of mobilization into terrorist organizations than others. Furthermore, a child’s own characteristics and experiences may lead him or her to be more vulnerable to socio-cultural factors promoting involvement in violence, or to seek out a means of involvement.