It is a very wicked thing for a nation to do wrong to others.
 Theodore Roosevelt, Theodore Roosevelt; an Autobiography (1913). copy citation

Context

“No nation can claim rights without acknowledging the duties that go with the rights. It is a contemptible thing for a great nation to render itself impotent in international action, whether because of cowardice or sloth, or sheer inability or unwillingness to look into the future. It is a very wicked thing for a nation to do wrong to others. But the most contemptible and most wicked course of conduct is for a nation to use offensive language or be guilty of offensive actions toward other people and yet fail to hold its own if the other nation retaliates; and it is almost as bad to undertake responsibilities and then not fulfil them.” source