请将以下文本总结在100字内，并且用第三人称叙述这段历史事件。 Clubs were first established in London by returned volunteers of the American Civil War. Their purpose was social, but evolved to include more grassroots functions such as discussion groups and evening classes. This evolution took place against a backdrop of increasing political and social reform in Victorian Britain. By 1900, the club system in London had become an essential part of civic life, supporting and enriching the communities which they served. However, the outbreak of World War I saw a decline in club activities as resources were diverted to the war effort. Despite this, the legacy of these clubs remained and influenced later community organizations.
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伦敦的俱乐部最初由美国内战归来的志愿者建立，最初仅为社交目的，但逐渐发展出讨论小组和夜校等功能，成为19世纪末维多利亚时代英国社会和政治改革背景下的重要组成部分。到1900年，这些俱乐部已成为伦敦市民生活不可或缺的一部分，支持和丰富了社区生活。尽管一战导致俱乐部活动减少，但其影响深远，为后来的社区组织提供了借鉴。
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