According to the Second Law of Thermodynamics (also known as the laws of conversation of energy and mass), anything is an isolated system cannot increase in complexity. For example, a wearing suit will eventually decompose.
Now we know the sun (and Earth mantle) is pumping energy into the system so the earth is not a closed system. However, the sun sends dangerous radiation that harms and even kills bacteria.
I am an advocate of evolution, but how can entropy begin when raw energy, unshielded from the sun, is ultraviolet light. As biological molecules require amino acids, proteins, DNA, and RNA is untenable when radioactive UV light kills simple bacteria.
I am well aware that the human body is a very complex machine. That is not the issue. My question concerns the first cell (inorganic material) from which life would sprout, as we know it. This inorganic material (soup that came alive) would not have been very complex at all. How did it survive the various heat of the sun in which all primitive life forms decay?