For some years I have spent my time on exactly these questions - both in thinking about ways to prevent war, and in thinking about how to fight, survive, and terminate a war, should it occur.

To the extent that these advanced weapons or their components are treated as articles of commerce, perhaps for peaceful uses as in the Plowshare program, their cost would be well within the resources available to many large private organizations.

It is immoral from almost any point of view to refuse to defend yourself and others from very grave and terrible threats, even as there are limits to the means that can be used in such defense.

Hopefully, nations will refuse to accept a situation in which nuclear accidents actually do occur, and, if at all possible, they will do something to correct a system which makes them likely.

Human and moral factors must always be considered. They must never be missing from policies and from public discussion.

Nevertheless, during the sixty years of the twentieth century many problems have come increasingly into the realm of acceptable public discussion.

Clearly, the first task is to gain acceptance of a more reasonable view of the future, one that opens possibilities rather than forecloses them.