structural:expansion, linguistic:translation, quality:corruption
Coppet Group and Benjamin Constant

The development into maturity of modern classical in contrast to ancient liberalism took place before and soon after the French Revolution. One of the historic centres of this development was at Coppet Castle near Geneva, where the eponymous Coppet group gathered under the aegis of the exiled writer and salonnière, Madame de Staël, in the period between the establishment of Napoleon 's First Empire (1804) and the Bourbon Restoration of 1814–1815. The unprecedented concentration of European thinkers who met there was to have a considerable influence on the development of nineteenth-century liberalism and, incidentally, romanticism. They included Wilhelm von Humboldt, Jean de Sismondi, Charles Victor de Bonstetten, Prosper de Barante, Henry Brougham, Lord Byron, Alphonse de Lamartine, Sir James Mackintosh, Juliette Récamier and August Wilhelm Schlegel.

Among them was also one of the first thinkers to go by the name of "liberal", the Edinburgh University -educated Swiss Protestant, Benjamin Constant, who looked to the United Kingdom rather than to ancient Rome for a practical model of freedom in a large mercantile society. He distinguished between the "Liberty of the Ancients" and the "Liberty of the Moderns". The Liberty of the Ancients was a participatory republican liberty, which gave the citizens the right to influence politics directly through debates and votes in the public assembly. In order to support this degree of participation, citizenship was a burdensome moral obligation requiring a considerable investment of time and energy. Generally, this required a sub-group of slaves to do much of the productive work, leaving citizens free to deliberate on public affairs. Ancient Liberty was also limited to relatively small and homogenous male societies, where they could congregate in one place to transact public affairs.

In contrast, the Liberty of the Moderns was based on the possession of civil liberties, the rule of law, and freedom from excessive state interference. Direct participation would be limited: a necessary consequence of the size of modern states and the inevitable result of creating a mercantile society where there were no slaves, but almost everybody had to earn a living through work. Instead, the voters would elect representatives who would deliberate in Parliament on the people's behalf and would save citizens from daily political involvement. The importance of Constant's writings on the liberty of the ancients and that of the "moderns" has informed the understanding of liberalism, as has his critique of the French Revolution. The British philosopher and historian of ideas, Sir Isaiah Berlin, has pointed to the debt owed to Constant.