Chemistry is us

We are all composed of chemistry that controls everything we do. 

We are chemistry, so do humans have free will?

• DNA - the building block of life, based on complexchemistry 

There's growing evidence that a type of drug - called dopamine receptor agonists - can cause some patients to become compulsive gamblers, binge shoppers or sex addicts.

It’s thought the drug causes this adverse reaction by over-stimulating the ‘pleasure seeking’ chemistry of the brain.  But many people find this hard to believe: how can a drug alter your behaviour against your will? If you do bad things, that’s your choice, and we shouldn't blame a drug.  After all, don’t humans have ‘free will’?

And yet, we are all composed of chemistry that controls everything we do. If your body’s chemistry changes, because of say a serious illness, or a profound injury, or the effects of a powerful drug, is it so difficult to believe that your behaviour and personality could consequently change too?