Percolation and Galam Theory of Minority Opinion Spreading
  The way in which an opinion rejecting reform can finally become the consensus of everyone was studied by Galam (2002) in a probabilistic model. We now replace his clusters by those formed via random percolation by letting particles diffuse on a lattice. Galam's rejection of reform is reproduced below the percolation threshold, whereas at and above the threshold, also approval of a reform becomes possible. 
Dietrich Stauffer