Abstract
We study the voter model with a finite density of zealots—voters that never change
opinion. For equal numbers of zealots of each species, the distribution of magnetization
(opinions) is Gaussian in the mean-field limit, as well as in one and two dimensions, with a
width that is proportional to 
, where Z
is the number of zealots, independent of the total number of voters. Thus just a few zealots
can prevent consensus or even the formation of a robust majority.