Sure conveyances existed prior to 1945. What did not exist prior to 1945 was cities and towns designed such that the only effective means to get around was a car. Yes, I grant that the car is a useful invention for the rural farmer. It is not a useful invention for someone living in a town or city because it does not scale to a population the size of a town or city; the only reason a car may appear useful is that post war towns and cities are so badly designed that a car is the least worst option. The beauty of a well designed town or city is that everything you need for daily life is within a five minute walk of your home, a walk in which you often bump into friends and neighbors; work is a couple mass transit stops away at most, and a traffic filled commute is not eating hours of each day. A car cannot improve upon this mode of life; it can improve the life of a farmer, but it only detracts from the life of a town or city dweller. Unfortunately, people can’t imagine an alternative to the “convenience” and “freedom” of being stuck in traffic, fighting for parking, and paying for gas.