My suspicion is that once you have literacy in place, the readership has not changed very much.
Robert HassI think it's true to say that in 1973 I could read every book of poems that was published in a year, and I did.
Robert HassThere are instances: [Henry David] Thoreau read [John] Wordsworth, [John] Muir read Thoreau, Teddy Roosevelt read Muir, and you got national parks. It took a century for this to happen, for artistic values to percolate down to where honoring the relation of people's imagination to the land, or beauty, or to wild things, was issued in legislation.
Robert HassPoetry had in the hands of various people become a place for inconvenient knowledge insofar as it was a place for knowledge at all. But it was a place where you could talk about other kinds of experience than the official version.
Robert Hass