It would ........ in a closed system.
However, the Earth is not a closed system and the Earth receives a gargantuan amount of solar energy that is then used to create order in Earthly biological systems.
The price paid for the increase in complexity of the biological changes on Earth is the increasing disorder on the Sun because of the consumption of the Sun's fuel.
The architect, the carpenters, the electricians, the masons, the roofers, etc., can build a more complex structure (a 4 bedroom house) out of a pile of disorganized materials only because they consume hundreds of pounds of food. The entropy price paid for that 4 bedroom house is the increase in the disorder of herds of cows and acres of wheat that were turned into Big Macs and the organized molecules of those Big Macs that were further disorganized into exhaled CO2 and H2O.
In the Solar System, the Sun is the equivalent of McDonald's.
Well, it's not just food - there is a certain amount of intelligence as well.