[used:)]

If causality does no wrong, then any trips to the past before the invention of time travel were well concealed and thus did not interfere with what we call our history, and the dreaded butterfly effect was really a crucial part of history as well, and couldn't have happened any other way.

I really don't know the half of the subject I'm getting into, but this is based on what I've collected over the years. My interpretation on "causality" being all of the actions that have occurred and will occur based on the arrangement of particles at the beginning of the universe, and "butterfly effect" being the notion that the slightest change depending on how far back you go can throw off history. If this is totally wrong and I've just made myself look foolish, please point it out so that I may not look foolish in the future.