Question

Who stood up in the Back of the old church and uttered “I will give my life to the destruction of slavery?”

Answer 1

mr john brown did :)

Answer 2

Answer: John Brown was a religious, abolitionist leader who raised his right hand and vowed "here before God, in the presence of these witnesses, I consecrate my life to the destruction of slavery.

Consecrate- to give or devote yourself to the worship of God.