2. Crystal Skull Makes The Entire Series More Plausible - Because Alien Technology Is Behind It All
Which is really more believable - that ancient religious artefacts have mystical super powers, or that aliens walked the earth at some point during the early stages of civilization? It's really up for the debate, and probably has a lot to do with your feelings about religion, but as far as this particular theory goes, it leans towards the "aliens could be real, and what we know as God is simply... extra-terrestrial." Now, consider that if aliens have been here all along, these religious icons Indiana Jones keeps uncovering, which bear super powers, might actually be alien in origin - disguised, as it were, as something more in line with what early humans believed. The main flaw in the theory? Why would they even bother?