Untidy from birth: when we were convinced that walking under oneself is natural and comfortable

Focus question : Among whom do you feel at home?
American scientists have investigated. Well, not quite scientists, but only one pediatrician. Well, not himself, but with the support of the marketing department of one company. Well, everyone liked it. Somehow the world switched to disposable diapers. Convenient, but whether it is great for kids, not expensive for parents, and whether it is safe for the environment such an innovation. And how was it before? Is it possible otherwise, so that it is convenient, cool, cheap, and safe?