Randomness... or not?

[DoomSlice]

Is it possible that NOTHING in life is random? Not necessarily influenced by a supreme being, but just a system of cause and effects that determines the course of all existence?

If so, what is the "initial cause"? If there are multiple causes, what caused those causes to happen in the first place?

If not, why? Does randomness really mean there is no cause to it - or does it mean that there can be different responses to the same stimuli? And if you get way down to it, can't you disect stimuli down to a level where you can find differences?

Just something that's been bugging me as I've been doing some economic research.