The present report is based on in-depth interviews with individuals formerly involved in politically motivated group violence, in order to acquire accounts of processes of radicalization in their own words. The main themes in the interviews were the following: 1) How did they become involved with militant activist groups? 2) What drove them to take part in specific militant operations? And: 3) What role did ideology, identity and social group processes play in these decisions? The latter theme is the main problem dealt with in this text. Thus, drawing on the three main themes listed above, the main conclusions of this text fall into three different categories: Ideology, Identity, Social Group Processes.