The Science of Government is called Rajdharma in ancient philosophy.

The teachings of rajdharma. 

The great sage Manu told about Raj Dharma to those who begged him to discourse upon the duties of man, etc., for their benefit. 

“After discoursing on the duties of the four Classes and the four Orders,

The great sage Manu says to the Rishis, we shall now describe Raj Dharma or the duties and qualifications, etc., or Rulers, in other words, we shall discuss as to who is fit to be a king, how he is to be selected, and how he can attain the highest bliss -salvation.

Let a Kshatriya (ruler), whose knowledge, culture and piety are as perfect as those of a Brahman, govern the country with perfect justice” MANU 7:A1, 2

In the following way, (God teaches), “Let there be for the benefit of the rulers and the ruled three Assemblies –

1.Religious

2. Legislative

3. Educational.

Let each discuss and decide subjects that concern it, and adorn all men with knowledge, culture, righteousness, independence, and wealth, and thereby make them happy.”

– Rigveda 3.36.6