Final answer:
The author of the Pi Kappa Alpha preamble is not specified in the provided references, and further investigation into fraternity archives or historical texts is necessary to identify the writer.
Step-by-step explanation:
The Pi Kappa Alpha preamble was not explicitly written by a single individual mentioned in the provided reference materials. This information may not be readily available within the given references, and it is recommended that additional sources such as fraternity history documents or archival materials be consulted to obtain a definitive answer regarding the author of the preamble.
Historical preambles such as The Declaration of Independence, composed by Thomas Jefferson, offer examples of core principles established in foundational texts, which are commonly seen in the preambles of various organizations including Greek fraternities like Pi Kappa Alpha.
However, the specific author of the Pi Kappa Alpha preamble or its history can be explored further by accessing the fraternity's archives or historical publications.