When I last saw Thomas R. Metcalf (around May 2022), we sat down to lunch with his historian wife Barbara in a café in Berkeley. He was antsy. Before the food came, he wanted to discuss a recently published book on British imperial history. He had spent several weeks poring through the thousand-page volume, taking notes, and following the footnotes.He was annoyed. The author had missed some important facts, they had cited poorly, and they didn’t know much about India. I didn’t dare to admit that I had not read the book as closely as he had. I remember how much he loved an argument, trusting that we had all done our homework.For those of us fortunate to be taught by Tom, we know how much he demanded: rigour, clarity in writing, careful argumentation, and a requirement that we could never overstate the evidence we had. If you handed in a poorly written draft, he said, “This is terrible!” If you said something in a seminar that didn’t quite make sense, he was known to raise his eyebrows and sigh loudly. He was allergic to jargon, once giving me a long speech about how the word “instantiate” doesn’t mean anything. He liked to provoke and be a devil’s advocate, acting as if he was never fully persuaded.For those of us who were fortunate to be taught by Tom, he was the most loyal and fierce advocate any student could have. As Lisa Trivedi, one of my PhD cohort, said at Tom’s retirement conference in 2003, Tom was an “accidental feminist.” Even though he had been at Berkeley through the turbulent 1960s, he had not been involved in the political unrest of the decade, and the first wave of feminist consciousness-raising passed him by.He could offend (and he often did). But when I decided not to apply for tenure-track jobs because I was pregnant, he was supportive. When I declined a job because it was too far from my husband, he agreed that commuting with a child would be exhausting. When I was offered my dream job, he said I would be crazy to refuse it. (Men rarely refused career opportunities for their families, he reminded me.)Tom’s scholarship will outlast him and us. From his first monograph, The Aftermath of Revolt (1964), to his last, Imperial Connections: India in the Indian Ocean Arena (2008), Tom reinvented himself several times as the scholarship on India and its relationship to the British empire changed. Writing Aftermath of Revolt, which was his Harvard dissertation, he was deeply influenced by his time at Cambridge as a masters’ student who worked with Ronald Robinson and John Gallagher.Also read: How Thomas R. Metcalf Traced the 50-Year Journey of India Shaping World HistoryThe Suez crisis was unfolding when he was in the UK and Britain’s response deeply affected him, particularly what he felt was a failure in the promises of decolonisation. Aftermath of Revolt has had a considerable afterlife. Made digitally available in 2015, it has long shaped how we understand Victorian liberalism through one of the biggest challenges it faced. The book has resurfaced in a new generation’s scholarship as political theorists turn to the relationship between liberalism and empire.Land, Landlords, and the Raj, which was published in 1979, navigated how much the field of imperial history, which was thriving in Britain, was different in the US. By the mid-1960s, an area studies approach meant that historians of India learned languages and deeply engaged with questions of culture that were India-centred.John Richards was trained in this tradition; as were David Gilmartin and Sandria Freitag. To write from an imperial perspective became outdated: to address what I think he felt was a lack in his own training, he turned to a study of Awadh’s talukdars, with material drawn from Indian archives.While these first two monographs were texts of intellectual and social history, in An Imperial Vision: Indian Architecture and Britain’s Raj (1989), Tom turned to a wholly new historical framework, which was architectural history. An Imperial Vision explained how monumental architecture in the British empire emerged.Untrained in the visual, he learned how to look at buildings, drawings, and read the work of architects, urban planners, and art historians. His seminars turned to imperial cultures, which influenced scholars such as Peter Hoffenberg, Carina Johnson, and Krystyna von Henneberg. The book’s imperial focus generated some important critiques from some of the graduate students he worked with in the 1990s. Among them, all from Berkeley’s Department of Architecture, Swati Chattopadhyay, Preeti Chopra and Will Glover, worked on the multiple ways that South Asians experienced architecture during the colonial era.Between An Imperial Vision and Imperial Connections: India in the Indian Ocean Arena, 1860-1920, Tom engaged in a number of field-building projects that brought together his engagements with British imperial history and the history of South Asia.In 1994, he published Ideologies of the Raj, part of a series in the New Cambridge History of India, that explained how ideas of similarity and difference shaped colonial governance. Published in the decade when postcolonial theory and imperial history confronted each other, Tom’s arguments in this book carefully acknowledged the impact of colonial occupation as he explained that what seemed like universalist liberal ideas became rationales for the differential treatment of Indians. Tom lost some friends over this book.Also read: Popular History versus Professional Historians: The Fight Against DistortionSome of his colleagues in British imperial history were scathing, believing that he had lost his way by turning to theory. A brilliant 1997 essay by Dane Kennedy, another of Tom’s students, captures this tension. Ideologies inspired a number of graduate students (too many to name). Many engaged with Tom’s fascination with the putative universality of liberal ideas: Vahid Fozdar, Kevin Grant, Deana Heath, Anne Keary, Lisa Pollard, Priya Satia, Rachel Sturman, and Nita Verma. Nasser Hussain and Kavita Datla pre-deceased him, which broke his heart. In one of my visits to Berkeley, he raged about this injustice, feeling that they had so many wonderful years of scholarship and living ahead of them.As he prepared to retire, Tom collaborated with his wife, Barbara Daly Metcalf, to write a textbook, A Concise History of India (2001), which has had several editions, multiple printings, and is used widely in universities across the world. Written from his and Barbara’s lectures over many decades, it shows how Tom and Barbara’s marriage was built on a strong foundation that enabled rich intellectual collaboration. Forging the Raj (2005) gathered the essays he had published in a range of journals and edited volumes.In 2008, five years after he retired from Berkeley, he published Imperial Connections, a final research-based monograph that decentered Britain and recentered India as the hub of a set of imperial connections that reached from India outward to southeast Asia and the eastern coast of Africa.Framed around some of the themes he developed in Ideologies, he focused on institutions such as the army and the traffic in indentured labour, who were highly mobile groups of Indians who traveled across what we would call the Global South in the last nineteenth – and early twentieth centuries.By then, there was a good deal of scholarship on the Indian Ocean, particularly for the early modern period, but Tom felt that it was crucial to tell the history from the perspective of India and the British empire.A seven-decade long career of writing, researching, teaching, and arguing as vociferously as Tom did is a long time. It requires patience, which Tom never seemed to have in person; it requires persistence, which Tom had in abundance. In his writing, his oeuvre shows how much he engaged with scholarship that was far afield of his own. He challenged his students because he believed we could do better. His work shows how much he challenged himself to write books that have had lasting power.Durba Ghosh is professor of History, Cornell University, USA.