They didn't want a strong central government so they apposed the convention.
The 13th Amendment forever abolished slavery as an institution in all U.S. states and territories. In addition to banning slavery, the amendment outlawed the practice of involuntary servitude and peonage. ... However, it ended slavery and began the long-term goal of achieving equality for all Americans.
Agriculture plays a crucial role in the rise and development of civilizations, since it allows for there to be a "food surplus"--meaning that people other than farmers can spend time and effort developing new skills and practicing new trades.
Narrow, they didn't feel that it covered enough of their basic rights. So the bill of rights replaced it.