This paper explores the critical period between 1870 and 1914, arguing for its foundational role in shaping the contemporary "Anthropocene." By examining the intricate connections between industrial expansion, intensified imperial conquest, and unprecedented environmental transformation, this study introduces the concept of the "Imperial Anthropocene." We contend that the high tide of global imperialism during this era was not merely a political or economic phenomenon but a profound planetary force, fundamentally altering Earth's systems through extensive resource extraction, land-use change, infrastructure development, and the globalization of commodity chains. The rapid industrialization in core imperial powers fueled an insatiable demand for raw materials and markets, leading to the systematic exploitation of colonial territories. This process initiated a series of cascading ecological effects, including widespread deforestation, soil degradation, biodiversity loss, and significant shifts in atmospheric composition. Furthermore, the paper highlights how colonial administrative structures, scientific practices, and economic policies facilitated and rationalized these environmental transformations, embedding an inherently uneven and extractive relationship with nature into the global system. By foregrounding the imperial dimension, this analysis reveals how the initial conditions of the Anthropocene were forged through processes deeply intertwined with power asymmetries, racial hierarchies, and the violent imposition of European modernity, laying the groundwork for the ecological crises we face today.