The type of dwellings that a certain group of people has can tell a lot about the society of that particular group. In this case we have the Karankawas that had homes easy for transportation, and the Caddos that had permanent homes of heavier build.
We can conclude that the Karankawas were nomadic people that were constantly on the move. They have lived in areas that were not suitable for agriculture, so they were hunting and gathering in order to get the needed food. This means that the societies were not large, but consisted of smaller number of people, and the groups were made out of the extended family or few families.
The Caddos, on the other hand, were having sedentary life according to their dwellings. They most probably lived in area suitable for agriculture, so they produced their own food, thus having no need to change their location of living. The societies were larger and more complex, as it was possible with the surplus of food, but also practical for development, and defense in case it was needed.
In modern America, a war of secession could be caused if some states concentrated on concepts focused on Republican or Democratic ideas. This is because, as we know, these two political aspects have very different, contrasting and adverse ideologies.
Supporters of both ideologies regularly see themselves as hostile and fail to dialogue in a coherent way, highlighting the positive points of each of them and disapproving the negative points that each has. This hostility can trigger tension, which could trigger a secession war if there was a concentration of Republicans in some states and a concentration of Democrats in others.
As we know, the south of the country has a predominance of citizens favorable to republican ideas. Although I do not believe in a possible war of secession today, we can imagine a situation where the concentration of Republicans in the south, generate hostility with the Democratic parties that trigger a second war of secession.
Fredrick wanted freedom for slaves and Captain canot didn't want freedom for slaves.