In my opinion, nothing could be more deadly to teaching science than to divorce it from the unifying theories which give observations meaning.

The constructal law provides a unifying theory of evolution.

While many researchers have explored the relationship between arousal and performance, one unifying theory has not yet been developed.

It is not for lack of unifying theories that foreign policy has succumbed to this condition.

Evolutionary psychology: Toward a unifying theory and a hybrid science.

Von Mises' approach is a unifying theory that covers all of the cases above.

Some bold scientists even contemplated a grand unifying theory in which three and perhaps all four forces were seen as manifestations of a single force.

But he devoted his last decades to thinking about a unifying theory, to no avail.

Still, what the field has lacked is a unifying theory.

Einstein intensely searched for such a unifying theory during the last decades of his life.