Movements: on the significance of words / Alberto Melloni -- The Jesus movement / Claudio Gianotto -- Pelagianism: from an ethical religious movement to a heresy and back again / Mathijs Lamberigts -- Lay religious movements in the Middle Ages / André Vauchez -- The great adventure of the Catholic movement in France in the nineteenth and twentieth centuries / Emile Poulat -- Increase and multiply: from organicism to a plurality of models in contemporary Catholicism / Enzo Pace -- The ecclesiology of the charismatic communities and the sects / Alexandre Ganoczy -- Catholic movements and communities of the faithful which arose in the twentieth century: some challenges to canon law / Jean-Paul Durand -- Catholicism by way of sectarianism?: an old hypothesis for new problems / Luca Diotallevi -- Dissidence and conformism in religious movements: what difference separates the Catholic charismatic renewal and Pentecostal churches? / David Lehmann.