Laius is responsible for his condition and there is no way for him to escape his fate, even with the fact that he does everything in his power with the purpose of fighting divinity's will. It is difficult and almost impossible to determine whether Oedipus should be accountable or not for killing Laius at the moment when he does so. One must consider that similar to how some religions promote the concept that some people are likely to be punished for the sins performed by their predecessors, Sophocles apparently wanted to put across the fact that Oedipus has no say at the time when he is fighting Laius, as he is forced to kill his father in self-defense.

The modern day society functions in accordance with the 'everything happens for a reason' system, taking into account that people are provided with benefits on account of the work that they do. However, fate is a different matter and even with the fact that there are a lot of coincidences proving otherwise, it would be difficult for someone to produce solid evidence demonstrating that fate actually exists. With the contemporary system promoting the belief that people are rewarded depending on their work and with no regard to the harm they inflict (as long as they do not do illegal acts), it is actually difficult to believe that people experience more or less fortunate episodes on account of the actions they perform.

There surely exists a divine power that controls the universe and that is responsible for virtually everything. However, it would be difficult...

Society functions on logics and the fact that many evil people throughout history have lived happy lives while many good people have suffered throughout their lives makes it difficult for someone to accept the fact that fate determines the way that each person lives.
It is probable that everything happens for a reason and that people are unable to comprehend the way that the world works. Perhaps some individuals suffer because their predecessors sinned greatly while others live happy lives because their predecessors performed numerous moral acts. All things considered, it is safe to say that fate does not exist when regarding things from a logical point-of-view and that it is probable to exist when regarding things from the perspective of someone believing in coincidences.

Works cited:

Chong, Gossard, "ON TEACHING the OEDIPUS REX," Retrieved December 5, 2012, from the University of Melbourne Website: http://classics-archaeology.unimelb.edu.au/CAV/iris/volumes16-17/chonggossard.pdf

Freud, Sigmund, "The Interpretation of Dreams: The Complete and Definitive Text," (Kessinger Publishing, 30.06.2004)

Saboor, Haya, "Role of Fate in Oedipus Rex," Retrieved December 5, 2012, from the Academia Website: http://www.academia.edu/1073775/Role_of_Fate_in_Oedipus_Rex

Wetmore, Kevin, J., "The Athenian Sun in an African Sky: Modern African-American Adaptations of Classical Greek Tragedy," (McFarland, 2002)