In the early 1990s, the Canadian Philosophical Association claimed that there is gender imbalance and gender bias in the academic field of philosophy. In June 2013, a US sociology professor stated that "out of all recent citations in four prestigious philosophy journals, female authors comprise just 3.6 percent of the total." The editors of the Stanford Encyclopedia of Philosophy have raised concerns about the underrepresentation of women philosophers, and they require editors and writers to ensure they represent the contributions of women philosophers. According to Eugene Sun Park, "is predominantly white and predominantly male. This homogeneity exists in almost all aspects and at all levels of the discipline." Susan Price argues that the philosophical "...canon remains dominated by white males—the discipline that...still hews to the myth that genius is tied to gender." According to Saul, "[philosophy, the oldest of the humanities, is also the malest (and the whitest). While other areas of the humanities are at or near gender parity, philosophy is actually more overwhelmingly male than even mathematics."