Neither can a nation, which is an entity, and which does not die as individuals die, refrain from taking thought for the interest of the generations that are to come, no less than for the interest of the generation of to-day
 Theodore Roosevelt, State of the Union Address. copy citation

Context

“but it is righteousness and not peace which should bind the conscience of a nation as it should bind the conscience of an individual; and neither a nation nor an individual can surrender conscience to another's keeping. Neither can a nation, which is an entity, and which does not die as individuals die, refrain from taking thought for the interest of the generations that are to come, no less than for the interest of the generation of to-day; and no public men have a right, whether from shortsightedness, from selfish indifference, or from sentimentality, to sacrifice national interests which are vital in character. A just war is in the long run far better for a nation's soul than the most prosperous peace obtained by acquiescence in wrong or injustice.” source