In Star Wars the Force has a number of rather fundamental effects on the structure of existence and particularly organic life. The Force can be tested, measured, and to some degree manipulated through technological means (like the creation of the Reborn). It is effectively the fifth fundamental force of the universe alongside gravity, electromagnetism and the strong and weak nuclear forces. Doubting the existence of the Force is foolish and largely a consequence of Palpatine's deliberate propaganda combined with millennia of obfuscation by the Jedi to the citizens of the Republic to prevent the public from researching the nature of the Force. Debates regarding the nature of the Force, on the other hand, remain wide open. While out-of-universe canon, notably the Jedi Academy sourcebook for SAGA, establishes that the Jedi viewpoint on the Force is the closest anyone has to the 'correct' interpretation, Jedi dogma is so twisted it's hard to know what that means, and no one in-universe is aware of this. Pretty much every Force tradition has a different viewpoint on what the Force ultimately is and how it works. All of them are still able to access its energy and utilize Force powers. This spectrum of viewpoints ranges from the explicitly religious - people who view the Force as a manifestation of the divine and their powers as miracles - to the purely rational, as in the Jal Shey, who approach the Force from an intellectual and scientific viewpoint. As far as the so-called 'will of the Force' which the Jedi seem to believe in, that's tricky. I have always viewed it that the nature of the Force favors certain outcomes inherently, and that because of its very much non-linear interaction with living things might be seen as 'intervening' from time to time. Essentially, because the Force is associated with life, the light side functions to promote the growth and development of life and the dark side its ultimately destruction on a cosmic scale - but this action might manifest inconsistently on a local scale. if the Force has a will, it is as a non-sapient entity. The Force is not a conscious being in the sense of a traditional mythological deity (though that does leave the question of what exactly the Ones are, and how they relate to the Force).