This approach is limited by its reliance on existing knowledge about known or theoretical biology of disease.

This inquiry led him towards questions of theoretical biology and philosophy.

His writings became particularly influential for the development of theoretical biology in Russia and several other countries.

Here is where the "golden age of theoretical biology" is leading.

Furthermore, he denied the distinction between theoretical and applied biology.

"The grapevine carries rumors about other subjects than theoretical biology."

For at least half of his time he was dedicated to do experimental research so his theoretical biology would not lose contact with reality.

He also wrote on philosophy and theoretical biology.

Among the central focuses is also theoretical semiotics as a basis for theoretical biology.

Easton holds a doctorate in theoretical biology from the University of Chicago.