Rethinking addiction: beyond disease, choice or moral failing

"Addiction can feel like an invisible force, pushing people to use substances even when they desperately want to stop. Understanding why this happens – beyond blame or shame – could be the key to real change.”

For decades, there has been an ongoing debate about addiction. Is it a disease? Is it a choice? Or is it a moral failing? Despite years of discussion, there are still no simple answers. What these debates have often produced instead are negative labels – terms that can make it seem as though people struggling with addiction are somehow a different species, separate from the rest of humanity.

But what if addiction is not simply about weak willpower, selfishness or moral failure? What if we looked at it instead as something that develops over time through a person’s unique life experiences and learning processes?

Let me explain.

The disease model of addiction has, in many ways, been helpful. By framing addiction as an illness, it has allowed people to view their struggles with greater compassion rather than shame. This shift has encouraged many individuals to seek treatment and support through recovery programmes, often enabling them to achieve long-term sobriety. In this sense, the disease model has played an important role in reducing stigma and helping people ask for support.

However, there can also be limitations to this perspective. Some people come to believe that because addiction is framed as an illness, they have little or no control over it, which can leave them feeling stuck or powerless. Even many years into recovery, some individuals may continue to see themselves as permanently “unwell”.

So what if we looked at addiction differently – not as a moral failing or a fixed disease, but as a process that develops over time?

Viewing addiction as a three-tiered process

One helpful way of understanding addiction is to imagine it as a triangle made up of three interconnected layers. At the top sits addiction itself, but beneath it are other processes that have gradually led the person to that point.

Tier three: the top of the triangle

At the top are the physical and neurological changes that can occur after long-term substance use.

Research shows that repeated drug or alcohol use can alter brain chemistry and make stopping extremely difficult. One explanation for this is disinhibition theory. This theory suggests that substances can weaken the brain’s natural self-control systems. Normally, these systems help us pause, reflect on consequences and regulate our behaviour.

However, drugs and alcohol can reduce this inhibitory control, making people more likely to act on impulses and immediate urges. Over time, this reduced self-regulation can make it increasingly difficult to resist substance use, even when someone is aware of the negative consequences.

Importantly, these neurological changes tend to occur later in the addiction process, often after many years of repeated use.

Tier two: the middle of the triangle

The second layer involves the brain’s learning processes.

One influential explanation here is incentive sensitisation theory. This theory suggests that repeated substance use can make the brain’s “wanting system” increasingly sensitive. Over time, the brain begins to react strongly to cues associated with the substance – such as certain places, emotions, people or memories – even when the substance itself is no longer particularly pleasurable.

These triggers can operate largely outside of conscious awareness, meaning someone may find themselves using them almost on autopilot. Many people experiencing addiction describe a confusing experience: they no longer enjoy the substance in the same way, yet the urge to use feels overwhelming.

This process often develops gradually and continues into the later stages of addiction.

Tier one: the base of the triangle

At the base of the triangle lies the individual’s unique life experiences.

This layer includes the reasons that substance use may have begun in the first place. For many people, substances initially serve as a way to regulate emotions or cope with difficult feelings.

In my experience working with people affected by addiction, this layer often includes experiences such as trauma, neurodiversity, abuse, bullying, co-dependency or ongoing mental health difficulties. Of course, every person’s story is different.

Understanding this foundation is important because addiction, at its core, is often about changing the way someone feels.

How therapy can help

Therapy provides a space to explore these layers in a safe and supportive way. By understanding the patterns that contribute to addiction, from life experiences to learned behaviours and brain processes, clients can begin to develop new ways of coping, regulating emotions, and rebuilding their relationship with themselves.

Working from this model also helps instil hope, showing that change is possible, build confidence in the ability to make different choices, and promote meaningful, lasting behavioural change rather than simply managing symptoms. Therapists can help clients identify triggers, understand patterns, and develop coping strategies tailored to their unique needs. Once addictive behaviours are under control, therapy can also address the underlying experiences that contributed to addiction, further supporting long-term recovery.

Why this perspective matters

Viewing addiction as a layered, process-driven experience empowers clients. It provides education, reduces shame, encourages self-awareness, and promotes autonomy and self-efficacy. It shifts the focus from “I am broken” to “I can change,” helping people take meaningful steps toward lasting recovery.