I googled Earlham College, and I am sure that it will provide your son with an excellent preparation for life.
But I am not at all sure about the links with Quakerism. As a child in the UK, I was brought up in a Quaker environment, and I am aware that Quakers played a major part in the foundation of America.
There are a lot of contradictions between the moral beliefs of Quakers, and their business practices.