Still, it was Dwight Eisenhower and the men of his generation who were actually running the country, and the America they governed was the one they remembered from their childhoods, during the turn of the century. Thus, while the country was exploding in terms of science, technology, and business, and had assumed a new international role as the most powerful nation on earth, the minds of the governing class were rooted in a simpler day. Many of the tensions of the era stemmed from this contradiction. Dwight Eisenhower was the last American President born in the nineteenth century.