it applied the doctrine of contributory negligence to the drinker in an action by him or his heirs arising out of injuries he sustained when intoxicated. We cannot agree.
Vesely dealt solely with the right of a third party, injured by the negligent act of a drunken driver, to recover from the person who' sold drinks to that driver. At the outset of the opinion, Vesely specifically states: “we do not decide . . . whether a person who is served alcoholic beverages in violation of the statute may recover for injuries suffered as a result of that violation.” (P. 157.)
Moreover, the ensuing discussion runs only to that portion of the old rule which turned upon the issue of proximate cause and held that the consumption rather than the furnishing of the liquor was the proximate cause of injury. Vesely points out that one whose negligence “is a substantial factor in causing an injury, ... is not relieved of liability because of the intervening act of a third person [the drinker] if such act was reasonably foreseeable at the time of his negligent conduct.” (P. 163.) Thus the seller’s negligent act remains an actionable proximate cause, even though the drinker’s consumption is a contributing cause. The Vesely discussion emphasizes that there may be more than one actionable cause of an injury, and it follows that not every intervening act breaks the chain of causation as to an injured third party. But application of this rule of probable cause does not sustain the right of the injured drinker himself to recover. Rather, if the concurrent negligence of the plaintiff is a proximate contributing cause of his injury, his own recovery is barred by his contributory negligence. It is clear that contributory negligence of the decedent bars recovery by his heirs (Buckley v. Chadwick, 45 Cal.2d 183, 194-201 [288 P.2d 12, 289 P.2d 242]).
Although contributory negligence is a matter of defense, it may be raised by demurrer if its existence appears upon the face of the complaint (3 Witkin, Cal. Procedure (2d ed. 1971) § § 817-818; 2 Chadbourn, Grossman, Van Alstyne, Cal. Pleading, p. 463).
Appellants, however, assert that decedent could not have been negligent in light of the allegation that he was “a habitual drunkard or an alcoholic and had lost the will power to resist the temptation when liquor was offered to him.” The theory obviously is that an act must be wholly volitional if it is to constitute negligence.
Adoption of such a rule, however, would have broad and socially undesirable consequences. The compulsive drinker—whether because he could not initially resist liquor or because he drank to the point where his resistance disappeared—would be freed from the standard of the reasonable