""Railroad Builders"" explores the dramatic history of railway construction worldwide, highlighting incredible engineering feats alongside the human and societal costs. The book examines the technological innovations required to conquer challenging terrains and the profound social and economic consequences of these railways, such as the displacement of indigenous populations. These ambitious projects fueled industrial expansion during the 19th and 20th centuries. The narrative delves into case studies like the Trans-Siberian Railway and Andean railways, revealing the techniques, tools, and often harsh labor conditions. It argues that railway construction was pivotal in shaping the modern world, driving economic growth and enabling resource exploitation. By drawing on archival documents, engineering reports, and personal accounts, the book provides a balanced view of the triumphs and tragedies associated with these grand endeavors. Structured to provide a comprehensive overview, the book begins with fundamental engineering principles then progresses through specific examples from around the globe. The concluding chapters synthesize these case studies, examining the lasting impact on global trade, migration, and geopolitical relations. ""Railroad Builders"" avoids romanticizing these achievements, instead presenting a critical examination of the social and environmental impact.