“It is from their foes, not their friends, that cities learn the lesson of building high walls. – Aristophanes
The early dwellings of most tribal cultures were built of materials that were readily available and easy to work with, such as bricks of clay and mud. As tribes gave up their nomadic ways and settled the first cities, they soon found that they needed more permanent and durable structures. The skill of masonry was developed to fill this need.”
The point of Masonry:
Because each upgrade increases your stone production by 10%, Masonry is for people who want to have higher stone production. The more stone you have, the more fortifications you may build, buildings you may construct, and further technologies may be researched. Although stone is just as useful as any other resource at the beginning of your game, stone quickly becomes the least valuable resource within a few weeks.
Level of importance: 6 / 10