Many things in the book Gulliver's Travels prove that it was set in the Restoration Period. Some of the ways you can tell this are: the clothing, the speech, the governments, and of course, the lack of technology. But these things do not prove that the book was written in the Restoration Era. Any writer from any time period after the Reformation Period could write a book similar to Gulliver's Travels, which was set in the Reformation Period. What sets Swift's masterpiece apart and actually proves it was written in the time when many things were changing is the use of satire and political ideas relating to the era