to scale-free [@Barabasi] etc.

The Ising model has been studied in different topologies [@Klemm; @WuZhou; @HolmeNewman; @barre], in particular, the topological details may affect the critical dynamics [@goswami2011] and the zero-temperature quench [@biswas2011].

In contrast with the Ising model, in the study of opinion formation there is no compulsory obligation to have symmetric interactions, each agent is influenced by those in his neighborhood, which are not necessarily influenced by the first agent.

Each individual may be a conformist or a contrarian and this character does not change in time. In these terms, the simple ferromagnetic Ising model represents a uniform society of conformists with local symmetric interactions.

The fourth ingredient is the update scheduling, that may be completely asynchronous, like in standard Monte Carlo simulations, or completely parallel, like in Cellular Automata, or something in between [@Derrida; @NewmannDerrida; @Cirillo]. It is not clear which scheme is the most representative of reality. Real human interactions are indeed continuous, but also clocked by days, elections, etc.

An effect that is favoured by parallelism is synchronization in the presence of complex dynamics. As happens in physics, a macroscopic irregular behavior (macroscopic chaos) implies a coherent, although irregular motion of many elements (the microscopic 