A worldview is basically how one perceives reality. Everybody has a worldview whether they think about it or not. How one interacts in life is a result of their worldview, even if it functions subconsciously for them.
Today, we like to compartmentalize aspects of life.. so we have this thing called religion, and then politics, and then finance, etc… and we may have differing viewpoints in how these categories function.
However, this oddity of fragmented worlds is new in the history of the world. The pre-modern world (before 1600′s) did not seem to make these distinctions. Politics, piety, spirituality, and ethics were one and the same. One’s spiritual world cohered with how they thought about morality, about economics, about govt, etc…
I’m pretty sure that when Jesus announced that the kingdom of God was at hand, he wasn’t referring to a private spiritual experience for people. It was something that would affect every aspect of their lives. When the apostle Paul traveled around the Mediterranean claiming that Jesus was Lord, people understood that this was a threat to Caesar. It wasn’t about a private religious observance.
What our thoughts are about God, who we are as people, where we came from, and how we perceive the world, are the foundation of our worldview. Then… our economics, politics, mission, ethics, family-life, etc… should cohere with that foundation. Instead, we often compartmentalize stuff because it is less risky to do so.
It is interesting that those who do try to unify their worldview are often considered radical. If you try to unify your thoughts about religion with politics, religion with science, politics with academia, economics with ethics, etc… society will regard you as radical.
However, it seems perfect sense to do so.