This chapter deals with the development and increasing prevalence of steam-powered technology in the life and culture of the 1830s. It discusses the vexed question of the relationship between liberalism and empire and the contribution of liberal progressives and technological radicals, such as Thomas Love Peacock and Thomas Babington Macaulay, to the process of empire. It argues that a war begun in 1839 between the British and the Qing empires acts as a summation of the progress in the decade towards a new form of steam-powered colonialism. The ‘Steam Romanticism’ of the 1830s had a strongly imperialist dimension. This chapter discusses the crucial contribution of the Romantic period satirical novelist and essayist to this process. As a leading administrator of the East India Company, Peacock was intimately involved with the commissioning, design, and construction of new, steam-powered vessels for use by the Company, notably the iron-hulled warship the Nemesis, the presence of which proved crucial in the First Opium War with China.