[Articles are] one of the many advantages that Greek has over Latin.
Without disputing mwh's assertion, I think it's worth pointing out that Latin has some advantages over Greek. Paradoxically, the lack of articles is one of them. Reading the slightly simplified Livy in the Latin forum, I was reminded of the concision and clarity of the best Latin prose. And the exquisite patterning of words that Latin poets such as Vergil and Horace achieve, taking advantage of Latin's capacity for radical hyperbaton, is impossible in Greek, cluttered as it is by articles--and by far too many particles.
I'm writing that tongue in cheek, of course. Both languages have an inherent capacity for expression in their own way, different as they are from one another. Tolstoy and Dostoevsky managed to write masterpieces of fiction in Russian, a language without articles. In fact, in the hands of a master, even English can be expressive.