Sure, a toggle is one option. The main point is to introduce popularity as a factor and ultimately the best UI and defaults are best decided through A-B testing

Sure, a toggle is one option. The main point is to introduce popularity as a factor and ultimately the best UI and defaults are best decided through A-B testing. I'd also add that it's usually a good idea to incorporate this setting into the URL, regardless of the UI, so that a specific order can be bookmarked and shared.