Sentence:  By far the greater part of Mr. Johnson's book is concerned with precisely that, the <WSD>will to power</WSD>, as it has been made manifest since the end of World War I—first in Europe, then on a rising scale in Asia, Africa, the Middle East, Latin America and the United States. 
Meaning of the word marked with <WSD> tags:  The forceful desire, especially in human beings, to aggressively overcome, conquer, and dominate others.