And this is precisely what "The Thoughts on African Colonization" did.

It dislodged the society from its powerful place in the moral sentiment of the North.

The capture of this position was like the capture of a drawbridge, and the precipitation of the assaulting column directly upon the walls of a besieged castle.

Within the pamphlet was contained the whole tremendous enginery of demolition.

The anti-slavery agent and lecturer thenceforth set it up wherever he spoke.
To him it was not only the catapult; it furnished the missile-like facts and arguments for breaching the walls of this pro-slavery stronghold as well.
The effect of the publication of "The Thoughts" in this country was extraordinary, but the result of their circulation in England was hardly less so.