There seem to be many prerequisites for life as we know it.
To name a few: order, function, compatibility, availability, sustainability, intelligence, consciousness, intuition and so on.
Focusing on only one, namely order.
What are the chances of order arising spontaneously, by chance, with no creator/designer?
I have often pondered this and recently came across a mathematical summary of the big picture:
If every particle in the known physical universe (10^80 particles), participated in one trillion interactions (10^12 interactions) per second, for the entire 30 billion years of the universe's existence (10^18 seconds), then we would by now have covered only 10^110 permutations.
If you had only 100 components in a container, what are the chances that a blindfolded person could lay them out in order on a table?
The answer is one chance in 100 factorial, or 100!, which computes to one chance in 10^158, an impossibility.
What about only 1000 components?
One chance in 4x10^2567.
What about only 10,000 components?
One chance in 3x10^35659.
What about only 100,000 components?
I don't know how to interpret the Wolframalpha.com result for 100,000! - although I suspect it may be wrong, and that this is the limit for most calculators.
How many components does a human body have?
100 trillion, or 10^14 cells each with 10^14 atoms, which is a total of 10^28 atoms.
So not only is spontaneous order in a human body mathematically impossible, it seems we cannot even calculate the odds (namely 10^28!).
(Legend and example: 10^2 means 10 to the power 2, which is a 1 with two zeros, namely 100)
How do you see the above?