We conceptualize political radicalization as increasing extremity of beliefs, feelings, and_x000D_ actions in support of intergroup conflict, and we identify mechanisms of radicalization for_x000D_ individuals, groups, and mass publics. Contrary to conventional wisdom, radicalization cannot_x000D_ be understood by focusing only on radicalized actors; most of the mechanisms identified_x000D_ depend on a trajectory of action and reaction that develops between those radicalized and the_x000D_ enemy they are radicalized against. The foundations of this trajectory are ingroup identification_x000D_ and perceived threat to the ingroup. We conclude that understanding radicalization requires_x000D_ understanding the dynamics of intergroup conflict as the conflict unfolds over time.We conceptualize political radicalization as increasing extremity of beliefs, feelings, and_x000D_ actions in support of intergroup conflict, and we identify mechanisms of radicalization for_x000D_ individuals, groups, and mass publics. Contrary to conventional wisdom, radicalization cannot_x000D_ be understood by focusing only on radicalized actors; most of the mechanisms identified_x000D_ depend on a trajectory of action and reaction that develops between those radicalized and the_x000D_ enemy they are radicalized against. The foundations of this trajectory are ingroup identification_x000D_ and perceived threat to the ingroup. We conclude that understanding radicalization requires_x000D_ understanding the dynamics of intergroup conflict as the conflict unfolds over time.We conceptualize political radicalization as increasing extremity of beliefs, feelings, and_x000D_ actions in support of intergroup conflict, and we identify mechanisms of radicalization for_x000D_ individuals, groups, and mass publics. Contrary to conventional wisdom, radicalization cannot_x000D_ be understood by focusing only on radicalized actors; most of the mechanisms identified_x000D_ depend on a trajectory of action and reaction that develops between those radicalized and the_x000D_ enemy they are radicalized against. The foundations of this trajectory are ingroup identification_x000D_ and perceived threat to the ingroup. We conclude that understanding radicalization requires_x000D_ understanding the dynamics of intergroup conflict as the conflict unfolds over time.We conceptualize political radicalization as increasing extremity of beliefs, feelings, and_x000D_ actions in support of intergroup conflict, and we identify mechanisms of radicalization for_x000D_ individuals, groups, and mass publics. Contrary to conventional wisdom, radicalization cannot_x000D_ be understood by focusing only on radicalized actors; most of the mechanisms identified_x000D_ depend on a trajectory of action and reaction that develops between those radicalized and the_x000D_ enemy they are radicalized against. The foundations of this trajectory are ingroup identification_x000D_ and perceived threat to the ingroup. We conclude that understanding radicalization requires_x000D_ understanding the dynamics of intergroup conflict as the conflict unfolds over time.We conceptualize political radicalization as increasing extremity of beliefs, feelings, and_x000D_ actions in support of intergroup conflict, and we identify mechanisms of radicalization for_x000D_ individuals, groups, and mass publics. Contrary to conventional wisdom, radicalization cannot_x000D_ be understood by focusing only on radicalized actors; most of the mechanisms identified_x000D_ depend on a trajectory of action and reaction that develops between those radicalized and the_x000D_ enemy they are radicalized against. The foundations of this trajectory are ingroup identification_x000D_ and perceived threat to the ingroup. We conclude that understanding radicalization requires_x000D_ understanding the dynamics of intergroup conflict as the conflict unfolds over time.We conceptualize political radicalization as increasing extremity of beliefs, feelings, and_x000D_ actions in support of intergroup conflict, and we identify mechanisms of radicalization for_x000D_ individuals, groups, and mass publics. Contrary to conventional wisdom, radicalization cannot_x000D_ be understood by focusing only on radicalized actors; most of the mechanisms identified_x000D_ depend on a trajectory of action and reaction that develops between those radicalized and the_x000D_ enemy they are radicalized against. The foundations of this trajectory are ingroup identification_x000D_ and perceived threat to the ingroup. We conclude that understanding radicalization requires_x000D_ understanding the dynamics of intergroup conflict as the conflict unfolds over time.We conceptualize political radicalization as increasing extremity of beliefs, feelings, and_x000D_ actions in support of intergroup conflict, and we identify mechanisms of radicalization for_x000D_ individuals, groups, and mass publics. Contrary to conventional wisdom, radicalization cannot_x000D_ be understood by focusing only on radicalized actors; most of the mechanisms identified_x000D_ depend on a trajectory of action and reaction that develops between those radicalized and the_x000D_ enemy they are radicalized against. The foundations of this trajectory are ingroup identification_x000D_ and perceived threat to the ingroup. We conclude that understanding radicalization requires_x000D_ understanding the dynamics of intergroup conflict as the conflict unfolds over time.We conceptualize political radicalization as increasing extremity of beliefs, feelings, and_x000D_ actions in support of intergroup conflict, and we identify mechanisms of radicalization for_x000D_ individuals, groups, and mass publics. Contrary to conventional wisdom, radicalization cannot_x000D_ be understood by focusing only on radicalized actors; most of the mechanisms identified_x000D_ depend on a trajectory of action and reaction that develops between those radicalized and the_x000D_ enemy they are radicalized against. The foundations of this trajectory are ingroup identification_x000D_ and perceived threat to the ingroup. We conclude that understanding radicalization requires_x000D_ understanding the dynamics of intergroup conflict as the conflict unfolds over time.We conceptualize political radicalization as increasing extremity of beliefs, feelings, and_x000D_ actions in support of intergroup conflict, and we identify mechanisms of radicalization for_x000D_ individuals, groups, and mass publics. Contrary to conventional wisdom, radicalization cannot_x000D_ be understood by focusing only on radicalized actors; most of the mechanisms identified_x000D_ depend on a trajectory of action and reaction that develops between those radicalized and the_x000D_ enemy they are radicalized against. The foundations of this trajectory are ingroup identification_x000D_ and perceived threat to the ingroup. We conclude that understanding radicalization requires_x000D_ understanding the dynamics of intergroup conflict as the conflict unfolds over time.We conceptualize political radicalization as increasing extremity of beliefs, feelings, and_x000D_ actions in support of intergroup conflict, and we identify mechanisms of radicalization for_x000D_ individuals, groups, and mass publics. Contrary to conventional wisdom, radicalization cannot_x000D_ be understood by focusing only on radicalized actors; most of the mechanisms identified_x000D_ depend on a trajectory of action and reaction that develops between those radicalized and the_x000D_ enemy they are radicalized against. The foundations of this trajectory are ingroup identification_x000D_ and perceived threat to the ingroup. We conclude that understanding radicalization requires_x000D_ understanding the dynamics of intergroup conflict as the conflict unfolds over time.We conceptualize political radicalization as increasing extremity of beliefs, feelings, and_x000D_ actions in support of intergroup conflict, and we identify mechanisms of radicalization for_x000D_ individuals, groups, and mass publics. Contrary to conventional wisdom, radicalization cannot_x000D_ be understood by focusing only on radicalized actors; most of the mechanisms identified_x000D_ depend on a trajectory of action and reaction that develops between those radicalized and the_x000D_ enemy they are radicalized against. The foundations of this trajectory are ingroup identification_x000D_ and perceived threat to the ingroup. We conclude that understanding radicalization requires_x000D_ understanding the dynamics of intergroup conflict as the conflict unfolds over time.We conceptualize political radicalization as increasing extremity of beliefs, feelings, and_x000D_ actions in support of intergroup conflict, and we identify mechanisms of radicalization for_x000D_ individuals, groups, and mass publics. Contrary to conventional wisdom, radicalization cannot_x000D_ be understood by focusing only on radicalized actors; most of the mechanisms identified_x000D_ depend on a trajectory of action and reaction that develops between those radicalized and the_x000D_ enemy they are radicalized against. The foundations of this trajectory are ingroup identification_x000D_ and perceived threat to the ingroup. We conclude that understanding radicalization requires_x000D_ understanding the dynamics of intergroup conflict as the conflict unfolds over time.