Building on the Hodgson–Mokyr debate in this journal (Volume 18, Issue 1, 2022), this article discusses how modern economic growth occurred in pre-Industrial Revolution Britain, with a particular focus on coalition politics and the marginalization of conservative political groups – vetoers to change. Such political marginalization was unusual before the 19th century, when monarchs had substantial political power and land-based conservative groups were their main political allies. This article finds the source of the English exceptionalism in the unique system of non-imperial personal union that Britain then had with the Dutch Republic and Hanover. Under this system, foreigner monarchs chose their local ally in Britain based on the security needs of their home states. It created a significant disadvantage to the Tories, the incumbent conservative groups, while providing a window of opportunity for the Whigs, the opposition group supported by new commercial interests, to form a coalition with the Crown. The long absence of the Tories from power resulted in the incorporation of their constituencies into the Whig-led regime, making the traditional economic interests the regime's ‘junior partners’, instead of formidable political competitors to the new commercial interests, which was the case before and elsewhere at that time.