Does re-birth just explains diversity of life or is there any underlying principle to support it?

Krishna Says ,'Any existing entity will never cease to exit and Any non-existing entity will never come into existence.'

Thus God, Soul and Prakriti which are three existing entities will never cease to exist and hence the re-birth of the same soul is justified.

God as all of us know is power house of all powers. It imparts power to Prakriti or Maya (Nature) to build this complex universe. The sequence of creation of the world in short is - MAYA which is empowered by God creates Ahankaar(Ego) -> Panch Tan-matra (Seeds of Vaccum,Air,Fire,Water,Land) -> Vacuum -> Air-> Fire -> Water -> Land

Islam does not provide any principled account of the world order while Hindu does.

Dick Teresi author and coauthor of several books about science and technology, including The God Particle. He is cofounder of Omni magazine and has written for Discover, The New York Times Magazine, and The Atlantic Monthly. Says -

"Indian (Hindu) cosmologists(in Scriptures), the first to estimate the age of the earth at more than 4 billion years. They came closest to modern ideas of atomism, quantum physics, and other current theories. India developed very early, enduring atomist theories of matter. Possibly Greek atomistic thought was influenced by India, via the Persian civilization."

Islam does not have any scientific base, Hindu Has.