slavery, kidnapping conditions
okay here we go. so historically, dreadlocks are a hairstyle that directly comes from slavery. when my people were taken from our native lands and forced on the ships, they were crammed so tightly, they would often get drenched in each others bodily fluids. that, plus time, and general lack of access to hygiene, matted the hair of the enslaved people and created this "style"
other groups have matted their hair but it's not the same thing, and shouldn't be called the same thing. i'm having some trouble finding the images now, but years ago i did a deep dive and found photos of what indian and irish matted hair looks like. neither looks anything like black dreadlocks do, since they didn;t use products to manipulate their hair texture to mimic ours.