But Vico was not widely read, even by 18th Centrry standards, as you note. Perhaps Voltaire read him. And Vico wrote much more about how to write history than actually writing history. Wiki only lists four works: "On Humanistic Education,"  "On the Study Methods of Our Time," "Universal right" and "The New Science", the latter of which was probably his most widely read work.

"It is not necessary to have hope in order to persevere."