The U.S. Supreme Court case City of Winchester et al. v. Winchester Water Works Company in 1919 revolved around a dispute between the city and its water supplier over contract terms and rates for services provided by the latter to the former. The city had entered into a thirty-year contract with the company, which included fixed rates for water supply that were deemed reasonable at inception but became contentious as costs increased over time due to inflation and other factors not accounted for in their agreement. The court ruled in favor of Winchester Water Works Company, asserting that such long-term contracts are binding unless they violate public policy or law, even if circumstances change significantly during their term making them economically unfavorable to one party or another. This decision underscored principles of contractual stability and predictability while highlighting potential pitfalls associated with long-term agreements without provisions addressing possible future changes in economic conditions.

In the dissenting opinion for the case City of Winchester et al. v. Winchester Water Works Company, Justice Holmes disagreed with the majority's decision to uphold a contract between the city and water company that prevented competition from other potential service providers. He argued that such an agreement was not in line with public policy as it essentially created a monopoly, stifening competition and potentially leading to higher prices or lower quality services for consumers. Furthermore, he contended that municipalities should have flexibility in managing their affairs without being bound by long-term contracts which may become unfavorable over time due to changes in circumstances or technology advancements. Therefore, he believed this contract should be voidable at will by either party rather than binding indefinitely.