Why this assumption that the only choice is between unbelief and an Abrahamic religion? People believed in God long before the Bible existed. As for the good, culture, and civilisation, they are surely outweighed by the bigotry, persecutions, and killings inspired by Judaism, Christianity, and Islam over the centuries. Anyone who says "God has spoken to me and what I say is the truth" is implying "and the rest of you are deluded liars". How can such an attitude not have sorry consequences?