author(s)
Md. Abdul Ahad

abstract
The objectives of this article are that to prove punctuated equilibrium theory represents shifting balance theory and these two theories declared invalid Darwin’s theory and Neo-Darwinian theory and those are true fact: Because all features of both theories are same- i) Genetic drift play the key role of both theories. ii) Both theories advocated evolution progresses rapidly in a small and isolated population with rapid evolution after long period of stasis without the help of Darwin’s theory. iii) Both theories advocated allopatric speciation, macroevolution, quantum evolution and species selection. iv) Fossil is the only evidence of both theories. Additionally, those theories declared invalid Darwin’s theory and Neo-Darwinian theory. As a result, if anyone proves that genetic drift unable to produce new species or rejected shifting balance theory and fossil does not support macroevolution but support gradual evolution; then punctuated equilibrium theory even allopatric speciation theory would be invalid automatically.