Serving all meal food at once prevents overeating compared to course-by-course service.

Original passage

Custom has decreed that the food shall be placed upon the table in courses. Not knowing what is coming next, one may eat a sufficiency of food which perhaps is not the best suited to him. When the last course is brought on, he often ventures to overstep the bounds, and take the tempting dessert, which, however, proves anything but good for him. If all the food intended for a meal is placed on the table at the beginning, one has opportunity to make the best choice.