"To tell the indigenous inhabitants of Brixton or Southall or Leicester or Bradford or Birmingham or Wolverhampton, to tell the pensioners ending their days in streets of nightly terror unrecognisable as their former neighbourhoods, to tell the people of towns and cities where whole districts have been transformed into enclaves of foreign lands, that "the man with a coloured face could be an enrichment to my life and that of my neighbours" is to drive them beyond the limits of endurance. It is not so much that it is obvious twaddle. It is that it makes cruel mockery of the experience and fears of hundreds of thousands, if not millions, of ordinary, decent men and women...In understanding this matter, the beginning of wisdom is to grasp the law that in human societies power is never left unclaimed and unused...Men's nature is not only, as Thucydides long ago asserted, to exert power where they have it: men cannot help themselves from exerting power where they have it, whether they want to or not...It is the business of the leaders of distinct and separate populations to see that the power which they possess is used to benefit those for whom they speak. Leaders who fail to do so, or to do so fast enough, find themselves outflanked and superseded by those who are less squeamish. The Gresham's Law of extremism, that the more extreme drives out the less extreme, is one of the basic rules of political mechanics which operate in this field...Both the general law and its Gresham's corollary point, in contemporary circumstances, towards the resort to physical violence, in the form of firearms or high explosive, as being so probable as to be predicted with virtual certainty. The experience of the last decade and more, all round the world, shows that acts of violence, however apparently irrational or inappropriate their targets, precipitate a frenzied search on the part of the society attacked to discover and remedy more and more grievances, real or imaginary, among those from whom the violence is supposed to emanate or on whose behalf it is supposed to be exercised. Those commanding a position of political leverage would then be superhuman if they could refrain from pointing to the acts of terrorism and, while condemning them, declaring that further and faster concessions and grants of privilege are the only means to avoid such acts being repeated on a rising scale. This is what produces the gearing effect of terrorism in the contemporary world, yielding huge results from acts of violence perpetrated by minimal numbers. It is not, I repeat again and again, that the mass of a particular population are violently or criminally disposed. Far from it; that population soon becomes itself the prisoner of the violence and machinations of an infinitely small minority among it. Just a few thugs, a few shots, a few bombs at the right place and time – and that is enough for disproportionate consequences to follow."