The main idea of "Ode to the West Wind"
In this poem, Shelley eulogizes the west wind as a powerful phenomenon of nature that is both destroyer and preserver.
The win enjoys boundless freedom and has the power to spread messages far and wide.
The keynote in the poem is Shelley's ever-present wish for himself and his fellow men to share the freedom of the west wind, remembering meanwhile his own and common human miseries.
And the dominant mood is that of hope rather than despair, as the poet is hoping for the realization of the freedom and joy that is enjoyed by the west wind.
The optimism expressed in the last two lines shows at once the poet's critical attitude toward the ugly social reality of his day and his faith in a bright future for humanity.