Magnetism

Imagine a world where there is no need for gasoline to run your car. You drive a car that never runs out of fuel. When you get stuck in a snow drift you simply turn off the drive engine, turn up the heat, get some food from the refrigerator in the back seat and wait to be rescued. Conversely, if you break down in the desert, you turn off the drive engine, turn up the air and get a cold drink out of the refrigerator.
In your home in the winter as the temperature goes below zero you turn up the heat because you don't have to pay a bill to the power company. In the summer when the temperature tops 100 you can crank the air as much as you want because the air conditioner is a perpetual motion machine.
You would also have appliances that can run forever without costing you except to buy them. If you could afford multiple freezers, you could preserve whatever you raise in your garden for a long time.
In the mid-twenty-first century as the world battles through the Second Great Depression there seems to be no world leader capable of bringing the world out of the Depression. God often raises up leaders from the most unusual people and from most unexpected places.
Will Sevrin was just a country boy that never had any plans for leaving the farm. God had a different plan for this man of faith.
When the grain elevator breaks Will's dad, Howard, asks his son, who has shown a talent for fixing machinery, to fix it. The truth was they could not afford to have someone else do it. While fixing it Will receives a revelation of how to build a motor that is almost a perpetual motion machine. For a time neither Will nor Howard realize what they have.
Sometime later the big tractor breaks down and Howard thinks they are finished. Will has a different thought.
When Will fixes it with magnetics like he did the grain elevator Howard figures out what they have and the world begins to change. When Will brings out just appliance motors at first the motors slip past the notice of those that would do them harm.
What Will invents next are vehicle motors that could pull the entire world out of the Depression yet forces array against him. Both corporate types who will be out of business if Will's machine comes to market and government officials that get payoffs from the providers, they have traditionally used try to stop Will's motor from coming to market.
As evil forces gather to try to stop this poor country family can they survive much less bring their engine to market.