I can't clearly understand your question. Could you please a bit specify it? So I'll try to help you.
In his book "Children of the Drug Wars", Damon Barret evaluates the impact that war has on children and on drugs.
The underlined words and phrases support the author's purpose because they (a) draw attention to the opinion that the United States is not doing enough to help these children. Those words and phrases communicate Barret's view that these children receive a <em>"death sentence"</em> or that the nation has <em>"turned its back"</em> on them.
The subordinating conjunction in the sentence is "after".
