Consider the following statement: "The ideas of a text are heavily shaped by the prevailing values and ideas of the composer's context." How does this relate to David Malouf's book Earth Hour?

Australian writer David Malouf's Earth Hour is a collection of poetry published in 2014.
In regards to how a writer's texts are shaped by their own values and ideas, many writers can be said to craft poems, short stories, and novels about their own life experiences without actually naming themselves as the speaker or character/persona. By using their own experiences, writers can tap into what they are familiar with and share these experiences and revelations with the literary world and its readers.
Many of Malouf's poems speak about the definition of a person's individual place within the collective time and space they occupy. For Malouf, it seems to be of the utmost importance that individuals are able to come to a realization about how they fit into the great scheme of things. Malouf's poetry speaks to how the world humankind lives in is a subjective one. What this means is that each individual must look at how the world around them impacts and influences who each person is.
Malouf's use of first-person pronouns allows the reader to be a part of his poems, experiences, and emotions. Given that Malouf grew up the son of a Lebanese father and English mother, Malouf's personal identity is one he embraced and allowed to help to define him. Many of his poems speak to this ideology: self-identity and what molds that identity.
One example of this appears in his poem "Retrospect." The poem speaks of two young men, "one of them, not me." The poem speaks of how each of the young men moves toward "a town that at this distance never gets / closer.” Each young man must decide for himself what his journey will be. This poem in particular speaks to the individual journey that each person must take in order to find both the destination and the self.
Through reading his poetry, it seems that Malouf's own determination to find himself is mirrored in his poetry. He passes on important information about how to get through life without losing a sense of self.