This is my understanding of Christian theology and how it has played out in my life.
Christians believe the world is fallen.
One capitalism and socialism are benign. The problem comes from the people that run the systems. Each is about power and who gets the power. As the old saying goes power corrupts. One the worker gets the money and the other is the capitalist. Christians believe it is all about God, and we behave like it is all about us.
The third way would be to serve others, be it your boss or employee, and do so to honor God.
You asked for the biblical view: We are called to be in the world and not of the world.
Christianity is about the need for redemption, the need for God’s grace and the salvation found in that grace.
The gospel summarized would be something like this, ”We are all worse than we could possibly imaging and deserving of God judgment, but God loved us so much he gave his Son for us so we would not have to pay that price.” The death of Christ was so brutal and in the end it was him dieing and being separated from God at death that set all people free. It is then open to all who are called by God to accept his displeasure and his grace.
When Christ left after the resurrection he said he left his sprit to guide us. It is the sprit that transforms Christians and not the effort or deeds.
In political terms, laws are needed to keep evil at bay as it is a reality.