Think about the last time you felt truly understood by someone – when you expressed exactly what you needed, and the other person responded in just the right way. That moment was made possible by communication. From the earliest cry of a newborn to the complex conversations of adults navigating relationships and responsibilities, communication is the invisible thread that holds human life together. But why exactly do we need to communicate? The answer goes much deeper than simply exchanging words. Communication serves as the engine behind our survival, our social bonds, our sense of self, and our ability to grow. Understanding these core purposes helps us appreciate just how central communication is to every aspect of daily life.
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Communication as a fundamental human need
From infancy, humans exhibit a profound drive to communicate. Newborns cry to signal discomfort, toddlers babble to experiment with language, and children ask endless questions to understand the world. This isn’t accidental – it reflects a deep-rooted biological and psychological need. Communication is the foundation of all human relationships, and research shows that even days-old infants can recognise their mother’s voice, pointing to how early and how instinctively we are wired to connect with others.
Psychologist Abraham Maslow’s hierarchy of needs offers a useful framework for understanding why we communicate. At the base of the pyramid are physiological needs – food, water, shelter, and sleep. Moving upward are safety, love and belonging, esteem, and self-actualisation. Communication is the vehicle through which we express and fulfil every single one of these levels. Without it, we could not signal hunger, seek safety, build relationships, or share who we are.
Satisfying physical needs
At its most basic, communication helps us meet the body’s immediate demands. When a baby cries because they are hungry or tired, that is communication. When a child points to a glass of water, or an elderly person says “I’m in pain,” they are using communication as a tool for physical survival. Primary physiological needs – food, water, sleep, and warmth – are non-negotiable for survival, and without the ability to communicate these needs, they risk going unmet.
This connection between communication and physical need is especially significant for individuals who face challenges in expressing themselves verbally. A person who cannot say “I’m thirsty” must rely on gestures, facial expressions, eye contact, or alternative communication tools to convey that need. Unmet basic needs – food, shelter, and safety – are closely linked to increased psychological stress, which underscores how critical it is for every person to have a reliable means of communicating physical discomfort or necessity. Whether through words, body language, pictures, or signs, the form of communication matters far less than the ability to communicate at all.
Influencing and shaping our environment
Communication gives us the power to act on the world around us, not just respond to it. When someone shouts “Watch out!” to warn another person of danger, or when a teacher instructs students on how to complete a task, they are using communication to directly influence outcomes and behaviours. This function – sometimes called instrumental communication – allows us to direct others, organise situations, and exercise a degree of control over our surroundings.
This is particularly important in situations involving safety. A child who can say “I don’t feel safe here” or “that person is hurting me” has a form of power that a non-communicating child does not. One of the most important factors in communicating effectively is non-verbal communication, which includes gestures, facial expressions, and vocal tone. These cues allow us to communicate urgency and emotion even when words fail. A raised hand, a firm gesture, or a sharp change in tone can all serve to alert, guide, or redirect others in a way that verbal instruction alone sometimes cannot.
In everyday settings, this reason for communicating plays out constantly: a doctor advising a patient on medication, a parent guiding a child through a routine, or a colleague explaining a process to a new team member. In each case, communication is not just informational – it is directional, shaping what happens next.
Fulfilling social and emotional needs
Humans are social beings, and communication is what makes genuine social connection possible. Communication meets relational needs by giving us a tool through which to develop, maintain, and end relationships. This includes not just the words we use but every hug, smile, wave, or shared look that communicates affection, reassurance, or connection.
The emotional dimension of communication is vast. When a parent comforts a frightened child, when friends laugh together, or when partners lean on each other during a difficult time, communication is creating and reinforcing human bonds. Communication helps us build relationships by allowing us to share our experiences, needs, and feelings, and connect with others. Non-verbal signals – a hug, a kiss, a warm smile – carry enormous emotional weight and are just as valid a form of communication as spoken language.
Beyond emotional expression, communication also serves our need for identity. Much of how we think of ourselves is shaped by our communication with other people – how others respond to us, how they describe us, and how we present ourselves in different social contexts. When we say “I’m proud of you” or “I’m feeling overwhelmed today,” we are doing more than conveying information. We are affirming our inner world and inviting others into it.
Seeking attention is also a legitimate social and emotional need, especially for children. Attention-seeking behaviour through communication – whether it’s a child calling out a parent’s name repeatedly, or an adult sharing news with a friend – reflects the universal desire to be seen, acknowledged, and valued by others.
Learning and sharing information
A vast proportion of what we know has come to us through communication. Communication helps spread knowledge and information – authors write books to share knowledge, teachers pass on experience, and friends discuss ideas, all contributing to an ever-expanding pool of shared understanding. Without this exchange, each person would be limited to what they could discover entirely on their own, which is a fraction of what becomes possible through interaction.
This purpose of communication is especially critical in educational settings. Research indicates that individuals spend up to 80% of their daily interactions exchanging information, which reflects just how central information-sharing is to the texture of daily life. Every conversation, classroom discussion, or shared story is an act of learning. Even informal exchanges – chatting with a neighbour, reading a message from a family member – contribute to how we understand the world and our place in it.
Crucially, the absence of communication leads directly to social isolation. A decrease in personal communication deepens the sense of distance and negatively influences the formation of social connections. When people – especially children – lack the means or support to communicate, they risk being cut off from the shared social and intellectual life that language and interaction make possible. This is why developing communication skills is not simply an academic exercise; it is a direct investment in a person’s social wellbeing.
Why all four purposes matter together
Communication is the cornerstone of daily interactions, shaping relationships, enhancing understanding, and enabling collaboration. The four purposes discussed here – meeting physical needs, influencing our environment, fulfilling emotional and social needs, and sharing knowledge – are not separate categories. They overlap and reinforce one another constantly. A child who learns to say “I’m scared” is simultaneously meeting an emotional need, influencing their environment by prompting a caregiver to respond, and learning that expressing vulnerability is both safe and effective.
When we support individuals in developing stronger communication skills, we are not just teaching a technical ability. We are opening access to the full range of human experience – the ability to be heard, to belong, to learn, and to participate meaningfully in the world. Communication is not just a convenience; it is a fundamental human need that impacts our emotional, social, and psychological well-being.
The broader significance of recognising why we communicate
Understanding the reasons behind communication has real-world implications. When educators, caregivers, and families recognise that every attempt to communicate – however unconventional – is serving a genuine human need, they become better equipped to respond with patience and creativity. While communication is a natural drive, it takes skill and practice to become a good communicator – and that journey requires the right environment, consistent support, and recognition that communication takes many forms beyond spoken words.
For individuals who face challenges in expressing themselves, this understanding is especially transformative. Whether through assistive technology, sign language, picture boards, or gesture, every alternative form of communication reflects the same core human need: to be understood, to connect, and to participate. Recognising the “why” behind communication reminds us that the goal is never just fluency in language – it is full participation in human life.
What do you think? Reflecting on these four key purposes of communication – meeting physical needs, influencing the environment, fulfilling social and emotional needs, and sharing knowledge – which one do you think is most often overlooked in everyday interactions? And how might recognising that overlooked purpose change the way you listen or respond to those around you?
References
- https://nuacom.com/the-fundamental-need-for-human-communication/
- https://www.canr.msu.edu/news/the_importance_of_communicating
- https://en.wikipedia.org/wiki/Maslow%27s_hierarchy_of_needs
- https://psychology.town/motivation-emotion/essential-guide-understanding-human-needs/
- https://pmc.ncbi.nlm.nih.gov/articles/PMC4592353/
- https://www.stevenson.edu/online/about-us/news/importance-effective-communication/
- https://socialsci.libretexts.org/Courses/Butte_College/Exploring_Intercultural_Communication_(Grothe)/01:_What_is_Intercultural_Communication/1.03:_Communication-_A_Human_Necessity
- https://www.cipp.org.uk/resources/news/the-importance-of-communication.html
- https://routecommunication.com/why-is-communication-important-to-human-life.html
- https://www.scientificworldinfo.com/2020/12/importance-of-communication-skills-in-everyay-life.html
- https://pmc.ncbi.nlm.nih.gov/articles/PMC11127413/
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