In the fourteenth proposition of John H. Walton’s The Lost World of Genesis One he proposes that God’s roles as Creator and Sustainer have more in common that we sometimes think.
(1) God’s work as Creator is completely finished. This includes the idea that the universe now “runs itself.” Some examples of this would be forms of theistic evolution that remove God from the scenario or deism.
(2) God is a micro-manager, dictating everything that happens as creation develops.
This sounds like a similar contention between some Calvinist and Arminians regarding salvation!
Walton argues that his “functional origins” view allows for us to think of creation as still going forward with God’s involvement, though not as micro-manager. In other words, when we think of God as “sustaining” creation this is also his continual work of creating.
How does this impact how Christians understand evolution? Walton writes:
The existence of biological processes is not a major concern, whereas the denial of any role to God in relation to those biological processes–whatever they are–are theologically and biblically unacceptable. (p. 122)