Full responsibility, on the surface, means that Manning is taking full responsibility under the law, and is not shying away from the legal consequences of his actions. He knows that according to the laws and the power structure, he's accountable for his actions which threaten said laws and power structure. Those self-interested parties will react in the appropriate way to defend the status quo.
Full responsibility to history means something else entirely.
Full responsibility to history means that Manning doesn't shy away from the responsibility he has in challenging a corrupt power structure, and fighting for the rule of law. He's accepting responsibility for standing up for truth, in spite of the legal consequences. He's accepting full responsibility for being part of something bigger than himself.
Salutes