Smoking has been around since about 1865 where cigarettes were hand rollled and sold to soldiers at the end of the Civil War.It wasn't till the mid 1930's to 1960's that cigarettes were found to be linked to lung cancer and caused a big lung cancer epidemic across the world.Average cigarette consumption was up to a wopping 195.05% and for every 100,000 people, 64 died from a type of cancer most likely caused by smoking.
As smoking became more popular the demand for cigarettes became much higher thus creating the need for more tobacco companies.New companies such as Camel, L&M, Virginia Slims, and Marlboro just to name a few were created in the 1900's in order to meet this demand.
Most people start smoking when they are in their teens and are addicted by the time they reach adulthood. Some have tried to quit but have returned to cigarettes because smoking is such a strong addiction. It is a habit that is very difficult to break. There are many different reasons why people smoke. Our Goal out here in the Bay area and eventually worldwide is to put an end to smoking for good and teach the next generation that their are other ways of dealing with things than to resort to smoking.
How to Quit
There are many ways that you could quit, stuff like nicotine patches and nicotine gum can help you quit smoking because they give you nicotine without the harmful chemicals of cigarette smoke. 
Another way to quit smoking is to speak to your family and consider going to a rehab for a couple of weeks, it might be hard for you but it will benefit you in the long run, you could even go to behavioral therapy to help combat your habits and your urges to smoke.