Sentence:  The United States stands at this time at the pinnacle of world power. It is a solemn moment for the American Democracy. For with primacy in power is also joined an awe-inspiring <WSD>accountability</WSD> to the future. 
Meaning of the word marked with <WSD> tags:  The state of being accountable; liability to be called on to render an account; accountableness; responsible for; answerable for.