Analyze the following excerpt from a recent article discussing contemporary political discourse:
“In a world inundated with contrasting viewpoints, the art of civil discourse has been all but lost. What once were discussions to bridge divides have devolved into shouting matches, where nuances of opinion are overlooked in favor of the loudest voice. To move forward, we must not only engage with those we agree with but also painstakingly listen to perspectives that challenge our own. Only then can we foster a culture of understanding and collaboration."
Based on this excerpt, identify the primary rhetorical strategy utilized by the author to enhance their argument regarding civil discourse.