Systems
Man was made in the image of God. Why shouldn't we expect man to make things too?
Nature is a system and it has a God. It is clear by the physics of the universe that God is system oriented. The question is not "Is something created by man but is it compatible with the character or intent of God?
Genesis 1:27 "So God created man in his own image, in the image of God created he him; male and female created he them."
The family is a system designed in the righteous nature of God.
Not all families are true to the righteous intent of God because not all men are true to the righteousness of God. No family can escape that righteousness.
Cain and Abel, born of the family of Adam and Eve brought offerings that appear to be a part of systems of sacrifice. Those systems were represented by altars. We are told that "... the LORD had respect unto Abel and to his offering:" but not for Cain. Genesis 4:4
Was their something wrong with the system created by Cain?
Jesus talked about building a church and appointed people and told them what to do and not do certain things which by nature is systemic. There are men who claim to be that Church but the question will remain are those systems true to what Jesus intended or are they a part of something that does not conform to Christ?