Aristotle writes in Politics,
>Now there is an erroneous opinion that a statesman, king, householder, and a master are the same, and that they differ, not in kind, but only in the number of their subjects. For example, the ruler over a few is called a master; over more, the manager of a household; over a still larger number, a statesman or king, as if there were no difference between a great household and a small state.

Aristotle:
>The rule of a household is a monarchy, for every house is under one head:
>whereas constitutional rule is a government of freemen and equals.

>Visitor: Well then, surely there won't be any difference, so far as ruling is concerned, between the character of a great household, on the one hand, and the bulk of a small city on the other? – Young Socrates: None. – It's clear that there is one sort of expert knowledge concerned with all these things; whether someone gives this the name of kingship, or statesmanship, or household management, let's not pick any quarrel with him.

This unitary view of State (the corporatist view) originated with Plato.
Plato said the relationship between political / economical was no different: that you can rule the State like one household under one head, that they had a like science and politics was to be unitary.
A one-party state is an extension of that unitary view: uniting the polity under one body in the modern day; before it was absolute monarchy, the pre-eminence of one estate over the estates-general (which represented multi-party democracies, because multi-estates were like multi-parties).

Plato Republic:
>That the other citizens too must be sent to the task for which their natures were fitted, one man to one work, in order that each of them fulfilling his own function may be not many men, but one, and so the entire city may come to be not a multiplicity but a unity.

Plato Republic:
>For factions… are the outcome of injustice, and hatreds and internecine conflicts, but justice brings oneness of mind and love.

Plato Laws:
>That all men are, so far as possible, unanimous in the praise and blame they bestow, rejoicing and grieving at the same things, and that they honor with all their heart those laws which render the State as unified as possible