But what are philosophers really for? The answer is, handily, already contained in the word philosophy itself.

In Ancient Greek, "philo" means love and "sophia" means wisdom: Philosophers are people devoted to wisdom.

Being wise means attempting to live and die well.

In their pursuit of wisdom, philosophers have developed a very specific skill set.

They have, over the centuries, become experts in many of the things that make people not very wise. Five stand out.

There are lots of big questions around: What's the meaning of life? What's a job for? How should society be arranged?

Most of us entertain them every now and then, but we despair of trying to answer them.

They have the status almost of jokes⏤we call them pretentious.

But they matter deeply, because only with sound answers to them can we direct our energies meaningfully.

Philosophers are people unafraid of asking big questions. They have, over the centuries, asked the very largest.

They realized that these questions can always be broken down into more manageable chunks.

And that the only really pretentious thing is to think one's above raising big, naïve-sounding inquiries.

Public opinion, or what gets called "common sense", is sensible and reasonable in countless areas.

It’s what you hear about from friends and neighbors, the stuff you take in without even thinking about it.

But common sense is also often full of daftness and error.

Philosophy gets us to submit all aspects of common sense to reason. It wants us to think for ourselves.

Is it really true what people say about love, money, children, travel, work?

Philosophers are interested in asking whether an idea is logical rather than simply assuming it must be right because it is popular and long-established.

We're not very good at knowing what goes on in our own minds.

Someone we meet is very annoying, but we can't pin down what the issue is.

We lose our temper, but we can't readily tell what we're so cross about.

We lack insights into our own satisfactions and dislikes. That's why we need to examine our own minds.

Philosophy is committed to self-knowledge, and its central precept, articulated by the earliest, greatest philosopher, Socrates, is just two words long: Know yourself.

We're not very good at making ourselves happy. We overrate the power of some things to improve our lives and underrate others.

We make the wrong choices because, guided by advertising and false glamor,

we keep on imagining that a particular kind of holiday, or car, or computer will make a bigger difference than it can.

At the same time, we underestimate the contribution of other things like going for a walk,

which may have little prestige but can contribute deeply to the character of existence.

Philosophers seek to be wise by getting more precise about the activities and attitudes that really can help our lives to go better.

Philosophers are good at keeping a sense of what really matters and what doesn't.

On hearing the news that he'd lost all his possessions in a shipwreck, the Stoic philosopher Zeno simply said:

"Fortune commands me to be a less encumbered philosopher."

It's responses like these that have made the very term "philosophical" a byword for calm, long-term thinking and strength-of-mind; in short, for perspective.

The wisdom of philosophy is, in modern times, mostly delivered in the form of books.

But in the past, philosophers sat in market squares and discussed their ideas with shopkeepers or went into government offices and palaces to give advice.

It wasn't abnormal to have a philosopher on your payroll.

Philosophy was thought of as a normal, basic activity rather than as an unusual, esoteric, optional extra.

Nowadays, it's not so much that we overtly deny this thought, but we just don't have the right institutions set up to promulgate wisdom coherently in the world.

In the future, though, when the value of philosophy is a little clearer, we can expect to meet more philosophers in daily life.

They won't be locked up, living mainly in university departments.

Because the points at which our unwisdom bites and messes up our lives, are multiple and urgently need attention, right now.