If criticism opens on freedom (see Kant and criticism), it has like major range to lead to the dialectical one which, according to Hegel, animates the bottom of the things.
However, speech of dialectical does not go from oneself.

Already, in Antiquity,Plato (428-348 front. J.-C.)
this one criticized: it saw in it the artifice sophis-
tick consisting in being able to show a thing
and its opposite, by reasoning "drawn by
the hair ".

In The XVIIIe Century, Kant (1724-1804)
on its side, denounced in the dialectical one
illusion which seizes the thought, when this one
exceed its limits by taking an idea for one
reality. Acting to think the beginning of
world, all being able to be known as since it is unverifiable,
the thought ends up having the impression that its assumptions
are shown.

Generally, a certain number of philosophers criticized in dialectical the false dialogue which one can be tempted to hold with the world, when one outrageusement makes it speak by finding a reason and an explanation for all.
The dialectical one is however not limited to these through, as two major thinkers point out it:
Plato and Hegel.

The heart is" dialogue with itself"

The dialogue is the attitude which one finds at the origin of philosophy.
Socrat (470-399 front. J.-C.) dialogued in the streets of Athens in order to awake the men of his time.
After him, Plato seized himself of this socratic step in order to make a method of it. He realized that one could not plate a knowledge coming from outside on humanity without falling into a dogmatism * destroying the thought; he endeavoured to give birth to this one from the interior, through a set of questions and answers not only in the teaching report/ratio, but also within the thought itself.
Because, he will say, the heart is "dialogue with itself".
It remains sharp while not ceasing dialoguing in itself. Since, the dialogue grew rich.
To dialogue became a method systematically employed, in order to make spout out all the aspects of a question before arriving at the unit of this one.

Following Plato, Hegel conferred a high value on dialectical while bringing two innovations:

- Initially, it extended this one to very whole reality all dialoguing with all, the history is the dialogue that God has with itself through a word speaking ad infinitum.

- Then, it extended the dialectical one to the negative one: this last being the engine of all things, those manage to dialogue while being affirmed through a conflict, then by exceeding this one (seetext has left).
Since Hegel, the dialectical one was at the origin of all the great ideas which animated modernity.
So today we live in a world of communication, it is because the idea spouted out that any dialogue with all.
So in addition the company progressed, it is because one recognized the positive character of certain changes like certain ruptures.
Lastly, if science progresses, it is that the scientific spirit does not cease "being revolutionized".