The difference between Selfishness and Self-Centeredness.

Human-Kind. Isn’t that lovely. We have moved away from the patriarchal term mankind – ‘man’ who has not always been ‘kind’, necessarily – toward equality between the sexes and acknowledging gender fluidity. Noah touches on this. If you’re interested in the evolution of humanity and how we are capable of co-operating as a global community, give this book a go. You may experience information overload – but when condensing 2.4 million years into less than 500 pages, Harari goes alright. I’m someone who didn’t pay attention to history at school so I found this book enlightening, empowering and also disheartening at times. Harari writes about the breakthroughs of the Cognitive, Agricultural and Scientific Revolutions. The power of human imagination, math and language has been instrumental in the development of humankind into an apex predator, and the destruction of everything else.

Abstract

Addiction is a complex, multifaceted phenomenon that has been described variously as a disease, disorder, syndrome, obsessive-compulsive behaviour, learned behaviour, or spiritual malady. Modern scientific understanding emphasises addiction as a chronic brain disorder shaped by neurobiological changes, learning, and social context. This article examines each conceptualisation and presents an integrated definition that aligns with current neuroscience, psychological, and public health evidence.

Conceptualising Addiction: Labels and Their Accuracy

No single label fully captures addiction’s complexity; each highlights certain truths while overlooking others.

Disease

From a medical perspective, disease is the closest match. Addiction involves persistent neurobiological changes in reward, stress, and self-control circuits, increases relapse risk over years, and shows substantial genetic vulnerability (~50–60%) (NIDA, 2018; Heilig et al., 2021). Treatments improve outcomes but rarely “cure” the condition. This framing is used by the American Society of Addiction Medicine (ASAM), NIDA, WHO ICD-11, and DSM-5-TR (as “Substance Use Disorder”) (NIDA, 2018).

Disorder

Disorder is also scientifically accurate and slightly less medicalised. DSM-5’s “Substance Use Disorder” captures behavioural, psychological, and biological criteria and recognises functioning and harm rather than framing addiction strictly as a lifelong disease (Heather, n.d.; Heilig et al., 2021).

Syndrome

Addiction may be described as a syndrome because it is a cluster of symptoms with behavioural and physiological manifestations, without a single causative factor. However, the term is too generic for practical use outside clinical texts (Blithikioti et al., 2025).

Obsessive and Compulsive Learned Behaviour

Addiction involves learning, habit formation, and compulsion through reinforcement of rewarding behaviours (Hyman, 2005; Hausotter, 2013). Yet describing it solely as learned behaviour ignores genetic predisposition, neuroadaptation, withdrawal, and social factors.

Spiritual Malady

Some mutual-aid traditions characterise addiction as a spiritual malady. While this may be meaningful for individuals, it is not scientifically explanatory: addiction can be adequately explained via biological, psychological, and social mechanisms (Lewis, 2017).

Modern Integrative Definition

The most accurate contemporary description of addiction is:
“A chronic, relapsing disorder of brain circuits involved in reward, stress, and self-control, shaped by learning, environment, and social context”.

This definition encompasses:

• Disease/disorder: medical accuracy
• Learned behaviour and compulsion: neuroscience and behavioural accuracy
• Social determinants: public health relevance
• Flexibility for personal or spiritual interpretations

In short, addiction is best understood as a bio-psycho-social condition that is treatable and sometimes reversible, rather than a deterministic, lifelong curse.

Neurobiology: Why Addiction Is Considered a Brain Disorder

Repeated substance use alters structural and functional brain circuits involved in reward, stress, motivation, memory, and self-control (Nwonu et al., 2022; NIDA, 2018). These changes can persist long after use stops, explaining why addiction is more than a matter of “bad habits” or weak will (NIDA, 2025).

Chronicity and Relapse

Addiction is often chronic and relapsing. Even after long periods of abstinence, cues and stressors can trigger relapse (Meurk et al., 2014; SAMHSA, 2023). Key regions implicated include the basal ganglia (habit formation), extended amygdala (stress), and prefrontal cortex (decision-making) (Kirby et al., 2024). Nevertheless, many individuals achieve stable remission, highlighting heterogeneity in clinical outcomes (Heilig et al., 2021).

Learning, Memory, and Habit Formation

Addiction exploits neural mechanisms of learning and memory: rewarding behaviours are repeated and consolidated into habits, with cues triggering compulsive responses even when the substance’s reward diminishes (Hausotter, 2013; Lewis, 2017). This intertwines biological disorder and learned behaviour.

Critiques and Limitations

Some scientists caution that framing addiction strictly as a brain disease is simplistic:

• Brain changes may resemble those from other motivated behaviours (Lewis, 2017).
• Many recover without formal treatment (Heilig et al., 2021).
• Social, environmental, and psychological factors are crucial to understanding addiction (Blithikioti et al., 2025).

Thus, while the disease model is powerful, it does not fully represent addiction’s heterogeneity or socio-psychological dimensions.

Implications for Treatment

Addiction is treatable, not simply curable. Interventions combining pharmacological and behavioural approaches, alongside social support, can foster long-term recovery (Liu & Li, 2018; Heilig et al., 2021). Like other chronic conditions, management — rather than elimination — is often the realistic goal (NIDA, 2018). Neural circuits can gradually readjust, particularly when environmental and personal factors support recovery.

Conclusion

Addiction is a learned, compulsive brain disorder with chronic potential, shaped by neurobiological, psychological, social, and environmental factors. Recognising addiction as both a disorder and a behavioural learning condition avoids extremes: it is neither an unchangeable fate nor merely a moral failing. This integrated perspective supports nuanced understanding, compassionate care, and effective treatment strategies.

References

Blithikioti, C., Fried, E. I., Albanese, E., Field, M., & Cristea, I. A. (2025). Reevaluating the brain disease model of addiction. The Lancet Psychiatry, 12(6), 469–474. https://doi.org/10.1016/S2215-0366(25)00060-4

Hausotter, W. (2013). Neuroscience and understanding addiction. Addiction Technology Transfer Center (ATTC) Network. https://attcnetwork.org/neuroscience-and-understanding-addiction

Heather, N. (n.d.). What’s wrong with the brain disease model of addiction (BDMA)? Addiction Theory Network. https://addictiontheorynetwork.org/brain-disease-model-of-addiction

Heilig, M., MacKillop, J., Martinez, D., Rehm, J., Leggio, L., & Vanderschuren, L. J. M. J. (2021). Addiction as a brain disease revised: Why it still matters, and the need for consilience. Neuropsychopharmacology, 46(10), 1715–1723. https://doi.org/10.1038/s41386-020-00950-y

Hyman, S. E. (2005). Addiction: A disease of learning and memory. The American Journal of Psychiatry, 162(8), 1414–1422. https://doi.org/10.1176/appi.ajp.162.8.1414

Kirby, E. D., Glenn, M. J., Sandstrom, N. J., & Williams, C. L. (2024). Neurobiology of addiction (Section 14.5). In Introduction to Behavioral Neuroscience. OpenStax. https://socialsci.libretexts.org/…/14.05:_Neurobiology_of_Addiction

Leshner, A. I. (1997). Addiction is a brain disease, and it matters. Science, 278(5335), 45–47. https://doi.org/10.1126/science.278.5335.45

Lewis, M. (2017). Addiction and the brain: Development, not disease. Neuroethics, 10(1), 7–18. https://doi.org/10.1007/s12152-016-9293-4

Liu, J. F., & Li, J. X. (2018). Drug addiction: A curable mental disorder? Acta Pharmacologica Sinica, 39(12), 1823–1829. https://doi.org/10.1038/s41401-018-0180-x

Meurk, C., Carter, A., Partridge, B., Lucke, J., & Hall, W. (2014). How is acceptance of the brain disease model of addiction related to Australians’ attitudes towards addicted individuals and treatments for addiction? BMC Psychiatry, 14, 373. https://doi.org/10.1186/s12888-014-0373-x

National Institute on Drug Abuse. (2018). Drugs, brains, and behavior: The science of addiction (Rev. ed.). https://irp.nida.nih.gov/…/NIDA_DrugsBrainsAddiction

Nwonu, C. N. S., Nwonu, P. C., & Ude, R. A. (2022). Neurobiological underpinnings in drug addiction. West African Journal of Medicine, 39(6), 874–884. https://pubmed.ncbi.nlm.nih.gov/36063103

Substance Abuse and Mental Health Services Administration. (2023). What is substance use disorder? U.S. Department of Health and Human Services. https://www.samhsa.gov/substance-use/what-is-sud

Historical Context

Historically, mental illness and addiction have been misunderstood and stigmatized. For much of history, these conditions were seen as moral failings or character flaws rather than medical issues. This has led to a persistent stigma that continues to influence societal attitudes.

Lack of Awareness and Education

There is still a significant lack of awareness and education about mental health and addiction. Many people do not understand that these conditions are medical issues that require treatment, just like physical illnesses. This lack of understanding contributes to negative attitudes and discrimination.

Media Representation

Media often portrays mental illness and addiction in a negative light, reinforcing stereotypes and misconceptions. These portrayals can shape public perception and contribute to the stigma surrounding these conditions.

Criminalization

Addiction, in particular, has been heavily criminalised. This has led to a perception of addiction as a criminal issue rather than a health issue, further entrenching stigma and discrimination.

Internalised Stigma

Individuals with mental illness or addiction often internalise the stigma they experience, leading to feelings of shame and low self-worth. This can prevent them from seeking help and support, perpetuating the cycle of stigma and discrimination.

Healthcare System

Even within the healthcare system, biases and stigma can affect the quality of care provided to individuals with mental illness or addiction. This can lead to inadequate treatment and support, further exacerbating the issue.

Social and Cultural Factors

Social and cultural factors also play a role in how mental illness and addiction are perceived. Different cultures have varying attitudes towards these conditions, which can influence how they are treated and supported.

The differential treatment of treatment-resistant substance use disorder (SUD) and treatment-resistant cancer by society can be attributed to several factors:

1. Perception of Control

Substance use disorders are often perceived as a result of personal choices or moral failings, whereas cancer is seen as an uncontrollable disease. This perception leads to stigma and blame towards individuals with SUD, while those with cancer are more likely to receive sympathy and support.

2. Historical Stigma

Historically, substance use has been stigmatised and criminalised, leading to a societal view that addiction is a choice rather than a medical condition. In contrast, cancer has been recognized as a medical condition requiring treatment and compassion.

3. Media Representation

Media often portrays substance use in a negative light, emphasising criminality and moral failure. Cancer, on the other hand, is often depicted with empathy and urgency, highlighting the need for medical intervention and support.

4. Healthcare System

The healthcare system has historically been more equipped to handle cancer treatment, with extensive research, funding, and specialized care. SUD treatment has lagged behind, with fewer resources and less comprehensive care options.

5. Complexity of Treatment

Treatment-resistant SUD involves complex psychological, social, and biological factors, making it challenging to treat effectively. Cancer treatment resistance, while also complex, has seen significant advancements in research and technology, leading to more effective treatments.

6. Social and Cultural Factors

Cultural attitudes towards substance use and addiction vary widely, with some societies viewing it as a personal failing. Cancer is generally viewed more universally as a disease that requires medical intervention.

REFERENCES

Substance Use Disorder and Stigma

Australian Government Department of Health and Aged Care. (2024). Initiatives and programs. Retrieved from https://www.health.gov.au/about-us/what-we-do/initiatives-and-programs

Morrison, A. P., Birchwood, M., Pyle, M., Flach, C., Stewart, S. L. K., Byrne, R., Patterson, P., Jones, P. B., Fowler, D., & Gumley, A. I. (2013). Impact of cognitive therapy on internalised stigma in people with at-risk mental states. The British Journal of Psychiatry, 203(2), 140-145. https://doi.org/10.1192/bjp.bp.112.112110

Wood, L., Byrne, R., Burke, E., Enache, G., & Morrison, A. P. (2017). The impact of stigma on emotional distress and recovery from psychosis: The mediatory role of internalised shame and self-esteem. Retrieved from https://repository.essex.ac.uk/21927/1/woodpr2017.pdf

Cancer Treatment and Stigma

American Cancer Society. (2023). Cancer treatment and survivorship. Retrieved from https://www.cancer.org/treatment/treatments-and-side-effects.html

National Cancer Institute. (2022). Cancer treatment (PDQ)–Patient version. Retrieved from https://www.cancer.gov/types/treatment-pdq/patient/cancer-treatment-pdq

World Health Organization. (2021). Cancer treatment and palliative care. Retrieved from https://www.who.int/cancer/prevention/diagnosis-screening/cancer-treatment-palliative-care/en/