Its success or failure depends largely on the extent to which Iran will, in fact, comply with its various provisions. The more important question is, will it lead to a permanent accord that will prevent Iran from acquiring nuclear weapons?
This deal is not perfect, and no one is saying it is. It wouldn't be an "interim agreement" if it was intended to be a long-term solution. But it freezes Iran's enrichment capabilities where they are, and makes sure we'll know if they restart.
Many publications have advice columnists, but none has our old friend Colonel Manners (ret.), whose experience in military and surveillance matters is evident from his impressive CV (unfortunately, a classified document).
If all goes well, the preliminary agreement between Iran and the five permanent members of the UN Security Council would ensure the peaceful nature of Iran's nuclear program and ultimately reintegrate it into the international community.
President Barack Obama may be a rare exception for a politician because he has actually kept most of his campaign promises. And he has done so in spite of the most partisan and dishonest opposition tactics an American president has ever faced.
A realignment of Middle East politics? That remains to be seen, but it is more likely than before with the signing of the agreement, and one with potential effects that could go beyond the immediate Iranian connection.