Success in an open world economy requires information and the willingness to risk for a return.

But success, he said, requires a new army of scientists and engineers.

It has not come easily or without conflict, and future success will no doubt require more of the same.

Success in business requires a knowledge of human nature and an acceptable personality.

Success of the project required a rail line near the mines.

But civilization, and success itself, usually required the delegation of responsibility.

The ultimate success of his mission would require obtaining them.

If athletic success required nothing more than physical coordination, the answer would obviously be, "Not much."

For that reason its success requires mutual cooperation and trust.

Success requires a lot of luck, to be sure, but a little foresight will go a long way.