 To classify Spinoza as an existence monist may be permissible. But the neutrality claim is based on the problematical both view of view of neutrality. This suggests that it is best to classify Spinoza as a double aspect theorist (see section  8.3  below). Hume’s case is more difficult to assess. It has been said that the prevalent 20th century interpretation of Hume has been neutral monist (see Flage 1982: 527). H.H. Price’s case for this view has been particularly influential (see Price 1932: 105–6). On the other hand, the neutral monist interpretation of Hume has been vigorously resisted (Flage 1982; Backhaus 1991).