Which takes us to the reasons why the executive branch is designed as it is - with one person at its top. A handful of Federalist Papers describe the reasons why it has this unitary design, the most important is generally held to be #70. In it Hamilton argues that part of the justification is that one person can keep a secret better than a multitude:
That unity is conducive to energy will not be disputed. Decision, activity, secrecy, and despatch will generally characterize the proceedings of one man in a much more eminent degree than the proceedings of any greater number; and in proportion as the number is increased, these qualities will be diminished.Worth perusing soon enough.
