not really an expert on physics/ chemistry...but as far as my v.limited knowledge makes me understand:
all matter is made of atoms, and such. and all atoms behave in a standard, uniform way when subject to the exactly same conditions. as simple example, when u take 2 hydrogen and 1 oxygen atoms, (and put them under watever condition thats required) it always results in a water molecule. and thats always the result under the same condition. ofcourse there are very many variables that exist, but when all those variable become a constant, creating THAT condition, the result is always the same.
under such a scenario, isn't all universe, life and everything included, always destined to roll out this way, as we currently see it. that nothing would been any different. all events from the point the universe was created until now and in future will always be the same, no matter what.
does anyone believe/think of it this way?
i have lot lots to add to this, but dont wanna make the first post long.