How did the understanding of the Declaration of independence evolve between 1776 and the American Civil War?

3. The third assignment (due December 1) will be an essay of between 2,000 and 2,500 words
that addresses the following question: How did understandings of the Declaration of
Independence evolve between 1776 and the American Civil War? Your essay should be based on
(The Declaration of Independence), (The Declaration of
Sentiments) and (Slavery and the Sectional Crisis).
For this essay, you must list your sources in a bibliography and cite them when appropriate,
using the Turabian/Chicago Manual of Style citation format.

https://www.owleyes.org/text/declaration-of-sentiments/read/text-of-stantons-declaration# – This is the link for the declaration of sentiments