There is evidence that the degree to which one gets hooked on smoking (and therefore finds it hard to quit) is at least partially dependent upon heredity.That's why one person can quit easily and another finds it nearly impossible.
The truth is that the vast majority of people start smoking at one time or another, and almost everyone who smokes tries to quit. Thus, the degree of smoking in the adult population is not far off from being a measure of the ability of people to quit.
It is well known that the children of smokers are more likely to be smokers than the is the general population. In the past it was usually assumed that this was environmental--because they grew up among smokers, they became smokers themselves. However, although NATURAL children of smokers are much more likely to be smokers than the general population, ADOPTED children of smokers are no more likely to smoke than the general population. This indicates that natural children of smokers find it harder to quit than adopted children, suggesting that the ability to quit is at least partially genetic.
The truth is that the vast majority of people start smoking at one time or another, and almost everyone who smokes tries to quit. Thus, the degree of smoking in the adult population is not far off from being a measure of the ability of people to quit.
It is well known that the children of smokers are more likely to be smokers than the is the general population. In the past it was usually assumed that this was environmental--because they grew up among smokers, they became smokers themselves. However, although NATURAL children of smokers are much more likely to be smokers than the general population, ADOPTED children of smokers are no more likely to smoke than the general population. This indicates that natural children of smokers find it harder to quit than adopted children, suggesting that the ability to quit is at least partially genetic.