The speaker of "Alone" ominously declares that "the race of man is suffering/ and I can hear the moan." Instead of talking about how suffering is something that all humans experience at some point in their lives, our speaker warns people about a change she observes in the world. It's as though humans are suffering more and more. She's noticing a shift in how humans live, and she's worried.
Although the speaker suggests that being alone is the cause of suffering in this poem, the true suffering seems to come from not knowing how to nourish the soul.
This poem offers a cure for suffering: finding a community that can nourish the soul.