What is more important the robust of public domain or the well being of private interests?

The well being of private citizens is more important.

Explanation:

The public domain has as its  primary duty the defense of the interests of civil society. If the state is better organized, more robust, it can help society to flourish. However, the well being of the state is subservient to the wellbeing of each citizen, private interests. Furthermore, civil society is the source of governance insofar as i) government officials are elected from civil society and ii) public policy serves the private interests of the people. So in a society it is indispensable to have a more robust state and a better- served civil society, keeping in mind the order of importance.

the adoption by russian princes of the mongols' diplomatic rituals

i beleive that it was john rolfe