This is a complicated disorder which can only effect nice white ladies, often in the educational or social
justice fields of employment, or through church
based organizations.
The most recognizable symptoms include having an earnest and idealistic eagerness to
help the more marginalized members of a society, such as persons of color, or the homeless. This can manifest itself through things like bake sales and canned
food drives, although occasionally, more touchstone examples (such as that of a
teacher assuming the role of mentor and parent) can be observed.
Nice White Ladies (or, NWL's) know that they are just that, though believe wholeheartedly that not only do their contributions actually
change the world significantly, but that they are somehow better than everyone else. There is more than a tinge of irony in this.
The male equivalent to Nice White Lady syndrome is the Savior Complex.