Since when have people learned skilled jobs through one-on-one training arrangements between a master craftsman and an apprentice?

The concept of apprenticeships, which involves a master craftsman providing one-on-one training to a novice or apprentice, has historical roots that trace back to the Middle Ages. During this time, skilled trades such as blacksmithing, carpentry, and tailoring were passed down from experienced artisans to young apprentices through hands-on training. This method not only allowed the craftsman to impart practical skills and knowledge but also ensured the preservation and evolution of trades.

The system of apprenticeship became formalized in guilds during the Middle Ages, where young individuals would be bound to a master for a period to learn the trade. This traditional approach to skill acquisition laid the groundwork for modern apprenticeship models still in use today, illustrating the longstanding importance of mentorship and hands-on experience in learning skilled jobs.

The other timeframes mentioned do not accurately represent the historical origins of the apprenticeship model and its significance in the transfer of skills across generations.