1. Plato - Plato was a rationalist philosopher and one of the first philosophers in history. He came up with the idea that forms as we know them can be in various different forms in the world of forms than how they appear in the world of matter, stating how forms have a unique soul that incarnated from the world of forms to the world of matter. With his we can have essences or ideas of the physical world.
2. Aristotle - had somewhat the same idea as Plato, but he was more of an empirist philosopher than a rationalist one. He instead said how matter had a unique part called the form, and threw away the idea of the existance of the world of forms proposed by Plato. He also said how everything that we knew, or understood all come from our senses, in which later our reason enters to deal with the rest.
3. William of Ockham - was a Criticism philosopher saying that reason is limited and faith isn’t therefore its more reliable like to show the existence of the soul, it can’t be proved by using reason. He came up with the theory of Ockham’s Razor where the most simple theory is the most probable but not necessarily correct.
4. Rene Descartes - he said the things that exist think in his famous quote “I think therefore I exist”. Everything exists in a common space therefore matter in this space leads to physics. He also said that existence worked like a machine therefore being able to be studied. Only thing he couldn’t understand was the idea of how the mind, something that doesn’t exist physically can affect the body.
5. Spinoza - also a rational philosopher that was his main stream. Spinoza said that the soul was perfect, but it was inside an imperfect physical body.
8. Immanuel Kant - he is from the stream of criticism which means that he mixed rationalism with empiricism. He liked some things of rationalism but some not and the same goes for empiricism. Kant created the noumena and the phenomena. The noumena is the unknowable which means that there are a lot of things that we cannot know and will never be able to know and the phenomena is what our reason perceives from the world, this means that we only know the things that our reason perceives and we will not know more since it is impossible.
9. Ludwig Wittgenstein - he also comes from the stream of criticism and he is an analitical philosopher. His philosophy is taken alot in account this days becuase it is a resent philosopher. His theory said that we can acquire knowledge through the use of language, but if we want to acquire knowledge from language we have to make a right use of it.









