Accidentalism is religion
religion without proof, not tested, observed.

Creation only by
1. Accidentalism. Limitless accidents create something from absolute nothing.
Something becomes more complex, formig universe and earth. One cell becomes man in 400 million years.
2. Creation. Rngineering. A Planner. Founders of scientific disciplines mostly Christians (Bible-believers), who noted the complexity of the world and living things. A list of top 100 would be around 99% Christians.

Is there another basic theory to explain creation other than above two?

BETTING YOUR LIFE (and family and friends) ON THE ODDS:

Carl Sagan on life creating from chance on any one planet, including earth:
1 chance in 10^2 billion zeros (that's number 1 followed by 2 billion zeros).

A law of probability states that any number that has more than 1 chance in 10^50 will NEVER happen, no matter the time, no matter the perfect conditions.

Dr. Frank Salisbury, Atomic Energy Commission, on the odds.
A. The chance of ONE DNA molecule forming by accident, assuming there is already life, and all the inhabitable 'perfect' planets: 1 in 10^415.
B. The chance of this ONE DNA molecule forming by accident if the universe is packed with earth-like planets, with no space between them : 1 in 10^377.

To get idea what these huge numbers mean:
imagine Amos the Amoeba with the job of transporting each atom in the universe from one end to the other. His rate of travel is ONE INCH per 15 billion years. And instead of just our universe, Amos has to travel the length of 600,000 trillion trillion trillion universes the size of ours. He will complete his job in 10^177 years.

I would not bet my life on these odds. I would not bet my life on a roll of the dice. Yet this is what one does when one believes in accidentalism.

Only the Bible has a perfect track record. What it records becomes reality.
It surpasses the 1 in 10^50 test, to basically infinity..

Darwin in his Origin said, "We may well assume ..." over 400 times.

I may well assume the Bible is correct, because its proofs are far more valid than accidentalism.

Not only the greatest scientists agree with Christ, but the greatest legal minds, experts on evidence:
Prof. Simon Greenleaf, whose rules of evidence are considered by many the greatest legal volume ever written.
Sir Lionel Luckhoo, Guiness Book's 'most successful attorney' with 245 consecutive major wins.
Both set out to disprove Christianity. Both became Christians after.
Lord Darling, fmr. Chief Justice of England : "Overwheliming evidence ... that the resurrection story is true ..."

One cell would not become a bug in one hundred billion years.