Some, particularly among the evangelical tradition, propose the existence of a general revelation which God confers to all mankind everywhere which ultimately convicts them of sin--therefore making it impossible for them to plead ignorance. I do think that the similarity of ethical and moral values across culture, as well as a common religious themes like heave, hell, the messiah, as well as scriptural doctrine that the general revelation is a real thing. I wonder, however, if it is possible to attain faith and God's grace by the general revelation alone. Lately I've tended to think that it is possible, because we find individuals gripped by invincible ignorance who nevertheless perform virtuous and altruistic acts which as a consequence of the curse of original sin I would normally judge to be impossible without the grace of God. I'm also starting to think that special revelation (viz. the Bible) may serve a purpose distinct from salvific conference, and instead may be the means to which a community of Christians (the Church) can be formed ultimately to bring the Kingdom of God to Earth. I will say that whatever the case is, I think it is ultimately a mystery which eludes us, but I thought that it might make for an interesting theological discussion.