True, textbooks are a primary source. (P.S We are learning about primary and secondary sources in social studies and I got the same question)
Im not a 100% but i believe its Popular Sovereignty
One of the Patriots' greatest strengths was their PERSISTENCE TO CONTINUE FIGHTING.
Even though they met with lots of resistance on their ways, yet the patriots refuse to quit and continued fighting from generation to generation until America obtain the total freedom she so much desired and craved for. The freedom would have been unobtainable, if the patriots had laid down their weapons and refuse to continue fighting due to weariness and their children would have continue to be subjected to all forms of bondage.<span />
The thing that the historians can learn from this text about the occupational and social structure of Middle Kingdom Egypt is that writing was important and how they developed their structure of writing.
From this, we can also learn how those old ages developed our own beliefs and influenced our way of life today.