I remember reading that the Holocene was unusually stable in climate, with the suggestion that agriculture arose because of that; this seems to suggest that agriculture was stabilizing the Holocene, with emissions countering Milankovitch drops.
https://www.eurekalert.org/pub_releases/2018-09/uow-afs090618.php
https://www.eurekalert.org/pub_releases/2018-09/uow-afs090618.php