Just because religious books such as the bible and most ancient texts do not go farther than 6000 years ago does not mean that where we are today did not come thru the survival of the fittest thru evolution
The earth and the laws of physics in the form that they have been for the past approximately 6,000 years, are different than they were before 6,000 years ago, IF indeed the universe is older than 6,000 years or so. The idea that some of the before-6,000-years-ago physics is similar to that which exists now might be true. But there isn't any evolution outside of simple change, and adaptation. We don't know what might have gone before, if there was a before.
DNA and GENE technology nowadays shows link thru the different species that have resulted in what we are today.
The common evidence in nature is like begets like. It happens all over the place, countless trillions upon trillions of times. Twisting it to suggest that evolution has happened - evolution would be like something begets something else - is trying to state that something happened that is not in evidence anywhere.
The one main book I recommend reading is Charles Darwin's Theory of evolution. It was an eye opener in its days as it still is relevant in this day and age.
I recommend this book to anyone who does not believe how we slowly evolved from other animals to what we are today.
The Darwin book you recommend is a religious book, and a really weird one. The fact that there are similarities between many plants and animals, simply shows that they/we can all live in harmony on the same planet, in similar habitats. It has nothing to do with the garbage Darwin suggests.