Final answer:
The trial of the war hero in Livy's 'The Trial of Scipio' represents a step in the development of the rule of law by emphasizing that no citizen is above the law.
Step-by-step explanation:
Based on the excerpt from Livy's "The Trial of Scipio," regarding the development of the rule of law, the trial of the war hero is significant in illustrating that no citizen was above the law. This principle is fundamental to the idea of a society governed by laws rather than by individuals. The passage highlights the importance of accountability and legal equality, where even the most powerful citizen could be brought to trial and required to answer for their actions under the same laws that applied to all citizens. This concept was a step towards the establishment of a fair and impartial legal system, which is a cornerstone of modern democracy and legal frameworks.