For many anti-Calvinists, including the Cambridge Platonists, the Calvinist doctrine of double predestination entailed unacceptable conclusions about the character of God. Inspired by the fractious political climate, seventeenth-century English anti-Calvinists frequently accused the Calvinists of making God into an ‘arbitrary tyrant’, one who imposed his arbitrary will upon a hapless creation, unbound by any principles of justice or goodness. After considering the political and theological background from which this anti-tyrannical discourse emerges, this chapter examines the ways in which, in their attacks on the doctrine of double predestination, Benjamin Whichcote, Henry More, Ralph Cudworth and John Smith all appeal to an explicitly Platonic notion of God’s unwavering intention to communicate his goodness to creatures as far as they are able to receive it.