21.   Dwight Eisenhower was in the White House and the dollar ruled the world.

22.   For a year, she ruled the world.

23.   Humans still rule the world of chess, but computers are showing more and more signs of being the heirs apparent.

24.   How explain her extraordinary success in an era when men ruled the world?

25.   How she stays upright is a mystery, but this is the moment everyone has been waiting for, contact with the spirits who rule the world.

26.   I see no point in ruling the world if you cannot take advantage of your position and no cat, of my experience, does either.

27.   If Soros ruled the world, he said, he would establish an international regulatory agency to rein in speculative excesses and provide financing during economic crises.

28.   If whales had opposable thumbs, would they rule the world?

29.   Imagination rules the world.

30.   In part the story deals with the aftermath of a war between humans and superintelligent humanoid computers that want to rule the world.