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The National Constitution Center , a dramatic glass and granite museum , is designed to be more than just another Georgian-style colonial look-alike housing rooms of musty documents from the early days of the Republic . Since the early years of the Republic , a critical aspect of the public lands debate is a largely pernicious preoccupation with payments to the Treasury . Pittsburgh 's connection to the Ohio and Mississippi Rivers made it a logical jumping-off point for travelers to the West during the early years of the Republic . In the early years of the Republic , China was extremely unstable , suffering from warlord strife within and the bullying and humiliation inflicted by the great powers from without . We begin in the early years of the republic , but focus on the period from the Civil War to the present . A century has passed since those volatile early days of the republic , yet the methods utilized by politicians to gain power have hardly changed . One of the chief objections was constitutional - an issue that had been debated in the early years of the republic without clear resolution until the spread of railroads beginning in the 1830s rendered the issue moot .