I do not mean but that other motives of a less social nature might have introduced themselves, and probably, in point of fact, did introduce themselves, in the progress of the enterprise. But in point of possibility, the motive above mentioned, when accompanied with such a thread of reasoning, is sufficient, without any other, to account for all the effects above alluded to. If any others interfere, their interference, how natural soever, may be looked upon as an accidental and inessential circumstance, not necessary to the production of the effect. Sympathy, a concern for the danger they appear to be exposed to, gives birth to the wish of freeing them from it: that wish shows itself in the shape of a command: this command produces disobedience: disobedience on the one part produces disappointment on the other: the pain of disappointment produces ill-will towards those who are the authors of it. The affections will often make this progress in less time than it would take to describe it. The sentiment of wounded pride, and other modifications of the love of reputation and the love of power, add fuel to the flame. A kind of revenge exasperates the severities of coercive policy.

IPML Chapter 17 Section 1