Final answer:
In the story Autobiografia de un Esclavo, the key event that resulted in Manzano's escape to Havana was his reading of a book titled 'The Columbian Orator.' If this event hadn't taken place, Manzano may have continued to live as a slave and never questioned the institution of slavery.
Step-by-step explanation:
In the story Autobiografia de un Esclavo, the key event that resulted in Manzano's escape to Havana was his reading of a book titled 'The Columbian Orator.' In this book, Manzano found a dialogue between a master and his slave, which inspired him to question the morality of slavery. The dialogue ultimately led to the voluntary emancipation of the slave in the story. If this event hadn't taken place, Manzano may have continued to live as a slave and never questioned the institution of slavery.