Why did slave not come to support John Brown?

Many enslaved individuals did not come to support John Brown's raid on Harpers Ferry due to a combination of factors, including fear of violent repercussions from slaveholders and the uncertainty of a successful uprising. Additionally, some enslaved people may not have been aware of Brown's plans or the extent of his intentions. The risk of severe punishment or death for participating in such a rebellion, along with the lack of a clear, organized movement for freedom, also contributed to their hesitance to join him.