Polymath comments in bold.
Clearly false. Conscience is learned, not native. It is promoted by society and parents, not internal and objective.
No, that's a popular myth. We can debate it if you are interested. Fair warning: I have science on my side.
According to Yale psychologist Paul Bloom, humans are born with a hard-wired morality. A deep sense of good and evil is bred in the bone. His research shows that babies and toddlers can judge the goodness and badness of others' actions; they want to reward the good and punish the bad; they act to help those in distress; they feel guilt, shame, pride, and righteous anger.
At one time, the conscience of many was offended by interracial marriage. Now it is not.
At one time, the conscience of many accepted slavery. Now it is more rare.
At one time, the conscience of most thought women to be inferior. No longer is this the case.
All three of the above statements make the same error. You are blaming conscience when the problem was a bias (the arrogance bias most likely) which a process involving a serious examination of conscience, one mind at a time, is resolving.
When humanity makes moral progress, conscience is the mechanism for change.