Freneau's poem "The Wild Honey Suckle" was a precursor to what philosophical school of writing?

Philip Freneau's 1786 poem "The Wild Honey Suckle" is an important predecessor of Romantic poetry and of Romanticism more generally. In the poem, Freneau combines Neoclassical poetic structure and meter with tropes suggestive of emergent Romanticism, such as the transience of life suggested by nature, the bittersweet melancholy afforded by fleeting moments of perception, and the capacity of poetry to capture such moments and immortalize Nature. The poem plays with a favorite convention of lyric poetry: the mortal flower.
One may profitably compare "The Wild Honey Suckle" with earlier antecedents in seventeenth century metaphysical verse such as George Herbert's 1633 poem "The Flower." In that poem, the poetic speaker directly addresses the Lord and praises Him for His "returns" each spring as Nature returns to life. But in turning to Freneau's poem, we see, comparatively speaking, no invocation of or address to the Lord. The mood is not one of wonder or gratitude at divine mercy. Rather, the poem is quite practical in its assessment of the zero-sum trade-off of existence. For Freneau, nothing is lost or gained in coming into into life and then vanishing from it just as quickly. The best that one can hope for is to derive some aesthetic appreciation of the experience:

If nothing once, you nothing lose,
For when you die you are the same;
The space between, is but an hour,
The frail duration of a flower.