Each of us by our daily acts of peace and our commitment to building a better world can inspire others and help create a groundswell for peace too powerful to be turned aside.

We all have choices. We can build walls or we can build bridges. We can give our talents to creating weapons of annihilation, as so many scientists have done, or we can work to find solutions to humanities greatest problems. Our orientation is found not only in our acts, but also in the policies we support or oppose.

Given [Donald] Trump's surprising recent election as president of the United States, his fate and that of the Bomb are about to become seriously and dangerously intertwined with the fate of all humanity.

That the man in question should be Donald Trump, with all his personal flaws, challenges the United States and the world as never before in human history.

A lot will depend on who [Donald] Trump chooses for key cabinet positions, but even more will depend on his consultations with his key advisor (himself).

Sooner or later there will be a nuclear 9/11 [by Islamic terrorists] in an American city or that of a US ally... A terrorist nuclear attack against an American city could take many forms. A worst case scenario would be the detonation of a nuclear device within a city. Depending upon the size and sophistication of the weapon, it could kill hundreds of thousands or even millions of people.

At one point, for example, [Donald Trump] argued that he knew much more than military leaders about the pursuit and defeat of ISIS. His assuredness of his own correctness seems also rooted in arrogance reflecting his fundamental insecurity. This insecurity and his belief in his own rightness, when combined with his success at making money, leads him to be self-reliant in his decision-making, which could result in his taking risks with threatening or using nuclear weapons.