Let's start with the dull stuff, because pragmatism.
The word "because," in standard English usage, is a subordinating conjunction, which means that it connects two parts of a sentence in which one (the subordinate) explains the other. In that capacity, "because" has two distinct forms. It can be followed either by a finite clause (I'm reading this because (I saw it on the web)) or by a prepositional phrase (I'm reading this because (of the web)). These two forms are, traditionally, the only ones to which "because" lends itself.
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To read the original article: English Has a New Preposition, Because Internet
