Then how does it include God?
Allow me to begin by reasserting that I'm talking about my own view. Not all evolutionary creationists or even all Christians will necessarily share this view (and I suspect that very few do).
As someone who adheres to Reformed covenant theology, I embrace covenantal apologetics (presuppositionalism). So, my view includes God in the most radical fashion, namely, as the axiomatic presupposition of my biblical worldview. That is to say, the foundation of all my reasoning, beliefs, and knowledge is located in the presupposition of the triune God and his revelational activity with man as his covenant creatures.
Given that all of creation is covenantal in character (including the cruciform nature of reality), all human reasoning, beliefs, and knowledge are analogical in nature; they are inherently covenantal activities of either obedience or rebellion. (Human knowledge is analogical because it is a reflection of God's knowledge but remains limited and derivative. We can understand aspects of truth and reality analogically, but we cannot fully comprehend them as God does.)
This presupposition is necessary to make sense of any human experience. Without it, one cannot account for logic, knowledge, morality, and the intelligibility and uniformity of nature (science). Consequently, rejecting this presupposition leads to incoherent absurdities or contradictions (if every attempt to borrow intellectual capital from the Christian worldview is disallowed).
It is with this presupposition in place that I hold evolutionary creationism as
a theological model for understanding the science and history of evolution from within a biblical worldview, holding that natural processes are orchestrated by God's ordinary providence in accordance with his good pleasure and the purposes of his will. I affirm that God, as the creator and sustainer of all reality, answers why anything exists at all, that man as
imago Dei answers why we are here, that the fall answers why there is human sin and suffering, and so on.
NOTE: The cruciform nature of reality emphasizes that the redemptive work of Christ on the cross extends far beyond a mere historical event or religious observance. Instead, it serves as the axis around which the entire cosmos revolves.