This, the fourth book in the series, had a very specific focus on the progress of the American government, from the first president up until Abraham Lincoln (though it didn't do more than merely mention him in the end). It was a decent read, specifically with the first 8 presidents of the United States, though it did briefly gloss over the 8 that followed. There was a lot of discussion on how the political parties formed, and what their sway was in the government, as well as how that was to influence so much of what would follow in history. On several occasions there was ominous foreshadowing of the Civil War. It seems that there were plenty of people who saw that as an inevitable conclusion to the struggles between the slave states and the free states.
There was a good bit covered in this time period as well, though there was a little bit of jumping around in the time period which made it a little more challenging to follow than I would like. However, many subjects were covered in this period, from the persecution and the pushing westward of the Native American tribes to the major industrial changes going on in the country which resulted in trains, steamboats, and the first factories in the country. It showed how much of the North was changing and becoming industrialized, while the Southern states were in a situation where they further relied on slavery to make profits, and what the results of those changes were. It covers the factors that influenced the change from slavery slowly starting to die out in the South to coming back into popularity as the demand for cotton grew with the invention of the cotton gin and the factories set to spin and weave the cotton in the North. It was a well thought out and detailed look into the factors of continuing slavery in the South, and the heated tensions that eventually led up to the succession of the Confederate States and the Civil War.
Given the complexity of events in this time period, it isn't surprising that there is overlap between this and the next book in the series. There was a good deal going on in this time period, and it seemed that this book was specifically focused on the foundation of the government and the political environment of the time period, as well as the influences that would lead up to the Civil War. From the looks of the next book, it will share some of the same influences, as well as other discussions on the pursuit of liberty in the United States of America.