Which retail innovation, first created in 1935, fundamentally changed how geography was marketed to consumers and ultimately spawned an entire industry of similar products?

The intersection of geography and retail has shaped how consumers navigate shopping experiences worldwide. From the earliest trade routes to modern location-based marketing, geography has been fundamental to retail success. This trivia question explores a fascinating innovation that revolutionized how we visualize and interact with geography in a retail context, forever changing consumer behavior and creating an entirely new product category.

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The Thomas Guide street map atlas
The Michelin Guide rating system
The Parker Brothers board game 'Monopoly'
The foldable road map by Rand McNally