Can someone provide in-depth information about the historical roots and development of the prominent Swiss supermarket cooperatives, Migros and Coop, tracing their origins back to the 19th century or earlier? I am particularly interested in understanding the historical context that led to the establishment of these cooperatives, the key figures involved, and how they have evolved over time to become major players in the Swiss retail industry. Additionally, insights into the cooperative principles, economic conditions, and societal factors that shaped their formation and growth would be greatly appreciated.