 Elisabeth’s correspondence with Descartes begins at her initiative in 1643 and continues until Descartes’s death in early 1650. Elisabeth does not seem to have produced any systematic philosophical work, and her extant philosophical writings consist almost entirely of her correspondence with Descartes. While we have Descartes’s works, and centuries of interpretation to contextualize his side of the exchange, we do not have this larger picture in which to situate Elisabeth’s thoughts. Thus, any account of her proper philosophical position must be gleaned through interpretation. It is evident from the correspondence that Elisabeth has a remarkable and wide-ranging critical philosophical acumen. Careful reading of her side of the correspondence does suggest she has some positive philosophical commitments of her own, on matters including the nature of causation, the nature of the mind, explanations of natural phenomena, virtue, and good governance.