Before revision:   The model features a phase transition between consensus, opinion polarization, and ideological states , which we analytically characterize as a function of the controversialness and overlap of the topics  .
After revision:  The model features a phase transition between consensus, opinion polarization, and ideological states . Interestingly, the ideological phase emerges by relaxing the assumption of an orthogonal basis of the topic space, i.e. if topics thematically overlap. Furthermore, we analytically and numerically show that these transitions are driven by the controversialness of the topics .