In Mises’s account, Human Action is purposeful conduct through which someone seeks a state they expect to be more satisfactory. His 1949 book bears the same title; this entry primarily explains the concept of action rather than summarizing the entire work.
Blinking because of eye irritation and deliberately closing a window are different kinds of event. In action, someone uses a means for an end, such as reducing a draught. Classifying a particular case can require further knowledge; observed movement alone reveals neither intention nor all its reasons. [Mises — Human Action, I]
Someone may decide not to send a prepared payment or to postpone a repair. Such omission can be action when intervention is possible and refraining serves an end. But not every absence of movement is chosen patience; lacking the opportunity or ability to act is a different situation. [Mises — Human Action, I]
Money can be a means of buying food, and food a means of preparing a shared dinner. Action selects among attainable possibilities and leaves something else unrealized. A receipt alone cannot identify the forgone alternative; one must know what the person could and wanted to do. [Mises — Human Action, IV]
Caring for someone, making a voluntary gift or acting with emotion can have ends just as trade does. Calling conduct purposeful does not praise its goal. Mises’s description of action as rational likewise does not imply perfect knowledge, faultless means or a morally acceptable intention. [Mises — Human Action, I] [Mises — Human Action, IV]
Someone can buy a tool that later fails or choose a road that turns out to be closed. Action starts from expectations before the outcome and proceeds under uncertainty. Failure alone therefore does not prove the original step lacked purpose, though it changes the assessment of means and later options. [Mises — Human Action, VI]
A user may expect a wallet setting to improve security and still be mistaken. Their belief matters for understanding the choice; actual operation must be examined to verify the result. Hayek’s distinction between plans and learning reminds us not to assume participants’ knowledge is correct without evidence. [Mises — Human Action, I] [Hayek — Economics and Knowledge]
A transfer can concern a purchase, custody change or rearrangement of one’s own funds. Unmoved coins alone do not prove deliberate long-term holding either: access to keys may be missing. Transaction data establish a technical event, but interpreting ends and available alternatives requires further support. [Mises — Human Action, IV] [Mises — Human Action, VI]
Praxeology studies general relations between ends, choices and means; Catallactics develops exchange analysis. Each participant pursuing an end does not establish coordination of all plans or an exact market outcome. A specific account needs evidence about knowledge, rules, mutual responses and their changes. [Mises — Human Action, I] [Hayek — Economics and Knowledge]
For the clearest picture, read this entry together with Praxeology, Methodological Individualism, Subjective Value Theory, Catallactics, Opportunity Cost. The reverse links also lead from Time Preference, Praxeology, Methodological Individualism, Ordinal Utility.