For example, excessive human desire for sex is lust, and the excessive human desire for food is gluttony; however, pride does not quite describe the human desire for external validation rather it mostly describes the personal feeling of accomplishment, so I was wondering if there is a specific word for the desire for external validation from other people or in general someone can shed some light on these concepts.
That's vanity. This term is
used to describe something that is done with the aim of getting praise, fame, or approval rather than for serious or good reasons
- The new bridge was quickly condemned as a "pointless vanity project", intended to enhance the reputation of the mayor. (Cambridge)
Here is how Jane Austen differentiates pride from vanity in Pride and Prejudice:
- Vanity and pride are different things, though the words are often used synonymously. A person may be proud without being vain. Pride relates more to our opinion of ourselves, vanity to what we would have others think of us.
Neediness/someone who is needy. Per TheFreeDictionary.com, "the quality of needing attention and affection and reassurance to a marked degree". Just be careful using this because it's a very negative way to describe someone so it's not acceptable in a formal context (or if you still want to be friends with them later).
I would suggest narcissism:
... people have an inflated sense of their own importance, a deep need for excessive attention and admiration, troubled relationships, and a lack of empathy for others. Mayo clinic
It implies more than just what you are looking for, but I think it fairly accurately hits the need for excessive need from your question.
Since you added one more nuance in a comment it is more clear what kind of word you are looking for. You say
I am referring to a very recent and popular trend of seeking large-scale status and popularity by say having high social media followers.
You could use then attention-seeker
someone who behaves in a way that will attract other people's attention. (macmillan)
It is a relatively recent word and very common, I find it used without a hyphen too. You will find an entry and synonyms for it in the UrbanDictionary, and I am mentioning that just to show how popular it is. It is also used as a noun, attention seeking. About it, Wikipedia says
Attention seeking behavior is to act in a way that is likely to elicit attention. Attention seeking behavior is defined in the DSM-5 as "engaging in behavior designed to attract notice and to make oneself the focus of others’ attention and admiration". The term "attention seeking" sometimes also assumes a motive of seeking validation. People are thought to engage in both positive and negative attention seeking behaviour independent of the actual benefit or harm to health.
However, although this term is said to have both positive and neutral connotations depending on context, it is definitely used pejoratively most of the time.
Even dictionaries show that
Attention-seeker: A person who tries to get attention, typically in a manner considered excessive or inappropriate. (yourdict)
Here are some synonyms of the term.
Obsequiousness may fit some aspects of the desire for validation, indicating servile obedience or an over-eagerness to please. An obsequious individual will go to excessive lengths to please others. It may not exactly describe the desire for external validation, but it does describe the behavior that one is willing to exhibit to get it. Not everyone who desires validation is obsequious, but everyone who is obsequious desires validation.
As per the first dictionary.com definition:
- lack of confidence or assurance; self-doubt:
He is plagued by insecurity.
How well this word fits will depend on your specific use case. Insecurity doesn't describe the behaviour so much as the cause. However, as a human weakness, I think it works with your listed examples of lust and gluttony.