However combinations or associations of the above description may now and then answer popular ends. They are likely in the course of time and things to become potent engines, by which cunning ambitious and unprincipled men will be enabled to subvert the power of the people and to usurp for themselves the reins of government. Destroying afterwards the very engines which have lifted them to unjust dominion.
In the above quote from Washington's Farewell Address (1797) what did he warn against?