How do the two narratives in Just Mercy inform both the head and the heart?

The two narratives inform both the heart and mind in that it appeals to reason both emotionally and with hard facts on why a Justice system should be more about Mercy and Justice rather than condemnation and marginalization.

Explanation:

Just Mercy written in 2014, is lawyer Bryan Stevenson's memoir about his work advocating for the rights of convicts, who have been marginalized by a biased, punitive justice system.

Through Just Mercy, Stevenson illustrates the flaws of the justice system in America, giving reasons for advocating for those crushed by the state's machinery. To achieve this, Stevenson arranges his narrative around two parallel lines of thought: the trial of Alabama death row inmate Walter McMillian, and the cases of his other clients.

Stevenson supports the main narrative ideas with statistics, trends, and incisive sociopolitical analysis to make three important observations about the justice system: one, that it is aimed toward retribution rather than social reform; two, getting quick, final outcomes matters more than fair trials; and three, the system is loaded against the poor and minorities, especially blacks, even before charges are framed.