This one is tricky but im pretty sure its the first one
Explanation:
the rapid increase of population ,technology , political changes and fame
In this poem<span>, </span>Whitman questions his own existence and the futility of life<span>. He ponders the "endless trains of the faithless," or the many people who, throughout his </span>life<span>, betray his expectations. He describes cities full of foolish people and reproaches himself for being no better than these faithless masses.</span>
