[1] His most subtle advisers, moreover, did not understand this psychology any better. Talleyrand wrote him that "Spain would receive his soldiers as liberators." It received them as beasts of prey. A psychologist acquainted with the hereditary instincts of the Spanish race would have easily foreseen this reception.
It is only by obtaining some sort of insight into the psychology of crowds that it can be understood how slight is the action upon them of laws and institutions, how powerless they are to hold any opinions other than those which are imposed upon them, and that it is not with rules based on theories of pure equity that they are to be led, but by seeking what produces an impression on them and what seduces them. For instance, should a legislator, wishing to impose a new tax, choose that which would be theoretically the most just? By no means. In practice the most unjust may be the best for the masses. Should it at the same time be the least obvious, and apparently the least burdensome, it will be the most easily tolerated. It is for this reason that an indirect tax, however exorbitant it be, will always be accepted by the crowd, because, being paid daily in fractions of a farthing on objects of consumption, it will not interfere with the habits of the crowd, and will pass unperceived. Replace it by a proportional tax on wages or income of any other kind, to be paid in a lump sum, and were this new imposition theoretically ten times less burdensome than the other, it would give rise to unanimous protest.