The shadow of ignorance is the choice not to know.
May we regard GOD, SATAN AND THEIR ANGELS as alien civilizations which differ only on ideological grounds? The most important conclusion is that the first intelligent lifeform splitted in good (social and without class-differences) and evil (selfish, greedy and with masters and slaves), when it became possible to live on more planets. Then this first intelligent lifeform brought life to other planets, and these are we and the remaining aliens or angels. This theory is the only manner to explain and combine ufologic, religious and scientific problems.