No laws were necessary with the first few cars on the road... But as the numbers increased, laws became necessary. Same with guns... Study the Founding Fathers intentions.
One possibility implied in your reply is that few [gun] laws would be needed were our large society to operate as many clusters of smaller societies, each with their own smaller population-dynamics.
Sorry Dave K, but you're wrong, the first laws for cars was passed in the 1800's (1894 if you want the date and there were just a little over 4,000 cars in the US in 1900). If you read what the founding fathers intends, you'd want as few laws as possible, with the smallest government possible, and no standing military, and with most of the power in the hands of the states.
But you can change this question to just about anything and it would be true, more bread = more deaths, more computers = more deaths, more cell phones = more deaths, more beds = more deaths, all of which are true. So the question is basically invalid.
And tell me with all those new laws for autos has auto deaths gone up or down. Up the only thing that has managed to bring them down is the fact people can no longer afford to drive so fewer miles has reduced MVA.