Disenchantment with politics is therefore toxic, and populism can only increase such disenchantment, since it leads to the promise of simple solution… - Julian Baggini

To answer this requires knowledge of ‘child development, healthy emotional lives, healthy cognition and what is going to equip children to become high-functioning adults’, and ‘there are scientific truths there waiting to be discovered’. But again, this only implies that scientific knowledge can inform ethics, not that it can determine it. Similarly, we can learn from a neuroscientific point of view why it is that heartbreak feels so bad, but neuroscience can’t tell us if it is worth taking the risk of paying that price by opening ourselves up to love.

Some may be surprised to have found that my defence of reason has been so eager to point out its limitations. With friends like me, you might wonder if reason needs enemies. But reason needs this kind of tough love. It cannot be treated like a child that needs unconditional support. Rather, it needs to be treated like an elite athlete that always needs to be pushed to work harder and improve, because otherwise nothing can be achieved. The most difficult issues we face often require us to go to the edge of reason, stretching its capacities to breaking point. To extend the training analogy, it would be a mistake only to praise it for what it does well almost effortlessly, such as analysing the formal logical validity of arguments or spotting contradictions. It needs also to pay attention to where it is naturally weaker, such as when it has to deal with ambiguity or premises that cannot be proven, and when it requires the careful use of judgement.

Philosophers understandably focus on the nature of reason itself. However, in order for reason to flourish, it needs to be practised in the right environment. And that is sadly often lacking in the very places where reason is held in the highest esteem.