For the prevention of hallux valgus using shoes that separates each toe of your foot. (healthy-joints.net)
Adding insult to injury, a bone spur can develop where the bones rub together, and this overgrowth can keep the toe from bending as much as it needs to when you walk, resulting in a stiff big toe (technically called hallux rigidus). (health.com)
Modern human footprints reflect the specialized anatomy and function of the human foot, which is characterized by a fully adducted hallux [big toe in line with the other toes], a large and robust calcaneus [heel] and tarsal region, a pronounced medial longitudinal arch, and short toes. (becominghuman.org)