Answer:
Inca rulers typically tried to construct bigger and broader highways than their
predecessors if they wanted to undertake conquests.
Explanation:
From the excerpt, the author narrates how magnificent the Inca roads were and how the people worked for their king so faithfully, who had not to give a command.
The piece of evidence that the author uses to support his argument about the pride of the Inca rulers is the detail he mentioned about Inca rulers constructing bigger and broader highways if they wanted to go on a conquest.