We all seem to wish for world peace, but how peaceful are we at home or at our workplace? If not, then world peace will never be possible, since our homes and workplaces are part of the world. Therefore, start where you are, perhaps even internal, and try to create peace there first. Only then can world peace be possible.
Keeping promises is hard. It requires us to do things we don't want to do. But keep those promises you must do. Otherwise, do not make them in the first place. But since you have made them, you must keep them, especially if it would benefit all those involved including yourself.