Before revision:  Finally, if humor is such an essential aspect of the human experience, and if humor can be expressed in such a simple formula which has remained undiscovered for this long, then this is an extremely surprising state of affairs worthy of further investigation.
After revision:  Finally, if humor is such an essential aspect of the human experience, and if humor can be expressed in such a simple formula with clear ties to phenomenology, and yet this discovery regarding such an essential part of the human experience has remained undiscovered for this long, then this is an extremely surprising state of affairs worthy of further investigation.