The modern theory called the synthetic theory of evolution was given by a group of scientists including Theodosius Dobzhansky, J.B.S. Haldane, R.A. Fisher, Sewall Wright, G.L. Stebbins, and Ernst Mayr.

Explanation:
The Modern Synthetic Theory of Evolution, also called the Neo-Darwinian theory, is a unifying theory of evolution that combines the concepts of Darwinian natural selection and Mendelian genetics.

This theory was developed in the mid-20th century by a group of prominent evolutionary biologists, including Dobzhansky, Haldane, Fisher, Wright, Stebbins, and Mayr.

By integrating these concepts, the Modern Synthetic Theory provides a more comprehensive understanding of how species evolve over time, taking into account both the genetic and environmental factors that influence the process of evolution.