Final answer:
Henry David Thoreau believes that imprisonment is ineffective because he considered it costly and counterproductive. In his essay "Civil Disobedience," he argued for passive resistance and nonviolent protest against unjust laws and government actions.
Step-by-step explanation:
Henry David Thoreau believes that imprisonment is ineffective because he considered it a costly and counterproductive punishment. In his essay "Civil Disobedience," Thoreau argued that under a government that imprisons individuals unjustly, a just person should also be willing to go to prison. He advocated for passive resistance and nonviolent protest against unjust laws and government actions.