What's the difference between modern poetry and ancient poetry?

Modern poetry does not pay attention to hierarchy, while ancient poetry is very strict about hierarchy.

Modern poetry does not pay attention to the equality of words in every sentence, but requires the equality of words in every sentence of ancient poetry.

In modern poetry, rhyme is dispensable, but in ancient poetry, rhyme is very strict.

Modern poetry does not pay attention to the neatness of antithesis, but ancient poetry is very particular.