John was studious and excelled in school, studied the Bible and was active, along with his mother, in Christian ministry at Central Presbyterian Church in Atlanta.
Humbled by his blessings, Eagan tithed to the church, supported numerous charities benefiting the poor, and used his business influence to improve conditions for workers.
McWane left ACIPCO in 1921 and Eagan began a second term as president, serving in this office until days before his death in 1924.
In accord with his Christian beliefs, and influenced by social and industrial reform movements of the day, Eagan developed a business model at ACIPCO based on the "Golden Rule".
He paid good wages and kept shifts to nine hours or less with overtime and sick leave, invested in worker safety programs, and treated all employees with fairness.
He also constructed affordable housing for workers, as well as schools, churches, a medical clinic, a library, a bank, and an employee-operated store.
While developing his plan for ACIPCO, Eagan bought back all the common stock of the company to become its sole owner by the end of 1921.