Final answer:
Mott and Stanton organized the Seneca Falls Convention after being excluded from participating in an abolitionist meeting due to gender, prompting them to focus on women's rights and leading to the drafting of the Declaration of Sentiments.
Step-by-step explanation:
Lucretia Mott and Elizabeth Cady Stanton organized the Seneca Falls Convention primarily because they could not participate in an abolitionist meeting. The convention in question was the 1840 World Anti-Slavery Convention in London, where both women had been delegates but were denied participation due to their gender. This exclusion motivated them to actively work on the issue of women's rights. In July 1848, they managed to call a national convention to address women's rights, leading to the creation of the Declaration of Sentiments. The document outlined grievances against the patriarchal society of the United States and called for equality, including the right to vote. The Seneca Falls Convention marked an important beginning for the women's rights movement, becoming a foundation for future actions and annual conventions advocating for women's equality.