Many people want to be more assertive in the workplace. Being assertive can help you voice your opinions to your coworkers, help you negotiate that promotion and pay raise, and also has a number of health benefits. Many people want to be more assertive but suffer from being too passive, abandoning their good ideas or not voicing their opinions to avoid conflict with others.
The reality facing both sides will not change: There are spoilers in the U.S. and Iran who will try to torpedo a deal, no matter the details. Precisely because it is impossible to satisfy ideologues, they only way to defeat them is to have a deal in hand that both sides believe is a win-win outcome.