By a faction I understand a number of citizens, whether amounting to a majority or minority of the whole, who are united and actuated by some common impulse of passion, or of interest, adverse to the rights of other citizens, or to the permanent and aggregate interests of the community.
There are two methods of curing the mischiefs of faction: the one, by removing its causes; the other, by controlling its effects.
There are again two methods of removing the causes of faction: the one by destroying the liberty which is essential to its existence; the other, by giving to every citizen the same opinions, the same passions, and the same interests.
It could never be more truly said than of the first remedy that it is worse than the disease. Liberty is to faction what air is to fire, an aliment without which it instantly expires. But it could not be a less folly to abolish liberty, which is essential to political life, because it nourishes faction than it would be to wish the annihilation of air, which is essential to animal life, because it imparts to fire its destructive agency.
The second expedient is as impracticable as the first would be unwise. As long as the reason of man continues fallible, and he is at liberty to exercise it, different opinions will be formed. As long as the connection subsists between his reason and his self-love, his opinions and his passions will have a reciprocal influence on each other, and the former will be objects to which the latter will attach themselves. The diversity in the faculties of men, from which the rights of property originate, is not less an insuperable obstacle to a uniformity of interests. The protection of these faculties is the first object of government. From the protection of different and unequal faculties of acquiring property, the possession of different degrees and kinds of property immediately results; and from the influence of these on the sentiments and views of the respective propietors ensues a division of the society into different interests and parties.
[From Alexander Hamilton et al., The Federalist, ed. Charles R. Kesler and Clinton Rossiter (New York: New American Library, 1999) 46.]