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It provides for better modeling of the real world by providing a much needed improvement in domain analysis and then integration with system design. OOP is no better at modeling the real world than any other method.Every computer program which seeks to replace a manual process is based on a conceptual software model of that process, and if the model is wrong then the software will also be wrong.The term "abstraction" is also open to interpretation, and therefore mis-interpretation, as discussed in Understand what "abstraction" really means.This is why some people's abstractions look more like the work of Picasso when what is required should look like the work of Michelangelo.If you do not believe that there is widespread confusion as to what OO is and is not then take a look at Nobody Agrees On What OO Is.
You should also consider the fact that it would be totally impractical to model the whole of the real world as it is simply too vast and too complicated.
Some people advocate having a group of database tables being handled by a single class, but this is not how databases work.
It is not necessary to go through one table to get to another as each table is an independent object with its own properties.
According to some OO 'purists' I am not qualified at all as I was not taught to do things 'their' way and I refuse to follow 'their' methods.
My response to that accusation is that there is no such thing as 'only one true way' with OOP just as there is no such thing as 'only one true way' with religion.