What would Sir Isaac Newton have made of it? There he was, painted in oils, gazing down at one of the strangest meetings that the Royal Society, Britain’s most august scientific body, has ever held. If Newton had flashed a huge grin, it would have been completely appropriate, for beneath him last week a two- day conference was unfolding on a booming new field of science: investigating what makes people happy. Distinguished professors strode up to the podium, including one eminent neurologist armed with videos of women giggling at comedy films; another was a social scientist brandishing statistics on national cheerfulness. Hundreds of other researchers sat scribbling notes on how to produce more smiles.

The decision by the Royal Society to pick ‘the science of wellbeing’ from hundreds of applications for conferences on other topics is no laughing matter. It means that the investigation of what makes people happy is being taken very seriously indeed. ‘Many philosophies and religions have studied this subject, but scientifically it has been ignored,’ said Dr. Nick Baylis, a Cambridge University psychologist and one of the conference organisers. For the Royal Society to give us it’s countenance is vital because that states that what we are doing deserves to be acknowledged and investigated by the best scientific minds.’

At first sight, the mission of Baylis – and the growing number of other scientists working on happiness research – appears fanciful. They want to deploy scientifically rigorous methods to determine why some people are lastingly happy while others tend to misery. Then they envisage spreading the secret of happiness across the globe and, in short, increasing the sum of human happiness. ‘If someone is happy, they are more popular and also healthier, they live longer and are more productive at work. So it is very much worth having’ he says.

Baylis, the only ‘positive psychology’ lecturer in Britain, knows that the aims of happiness research might sound woolly, so he is at pains to distance himself from the brigades of non- academic self-help gurus. He refers to ‘life satisfaction’ and ‘wellbeing’ and emphasises that his work, and that of others at the conference, is grounded in solid research. So what have the scientists discovered – has a theory of happiness been defined yet?

According to Professor Martin Seligman, probably the world’s leading figure in this field, happiness could be but a train ride – and a couple of questionnaires – away. It was Seligman, a psychologist from Pennsylvania University, who kick-started the happiness science movement with a speech he made as President of the American Psychological Association (APA). Why, asked Seligman, shocking delegates at an APA conference, does science only investigate suffering? Why not look into what steps increase happiness, even for those who are not depressed, rather than simply seek to assuage pain? For a less well- known scientist, the speech could have spelt the end of a career, but instead, Seligman landed funding of almost £18m to follow his hunch. He has been in regular contact with hundreds of other researchers and practicing psychologists around the world, all the while conducting polls and devising strategies for increasing happiness.

His findings have led him to believe that there are three main types of happiness. First, there is ‘the pleasant life’ – the kind of happiness we usually gain from sensual pleasures such as eating and drinking or watching a good film. Seligman blames Hollywood and the advertising industry for encouraging the rest of us, wrongly as he sees it, to believe that lasting happiness is to be found that way. Secondly, there is ‘the good life’, which comes from enjoying something we are good or talented at. The key to this, Seligman believes, lies in identifying our strengths and then taking part in an activity that uses them. Third, there is ‘meaningful life’. The most lasting happiness, Seligman says, comes from finding something you believe in and then putting your strengths at its service. People who are good at communicating with others might thus find long-lasting happiness through becoming involved in politics or voluntary work, while a rock star wanting to save the world might find it in organising a charity concert.

Achieving ‘the good life’ and ‘the meaningful life’ is the secret of lasting happiness, Seligman says. For anybody unsure of how to proceed, he has an intriguing idea. To embark on the road to happiness, he suggests that you need a pen, some paper and, depending on your location, a railway ticket. First, identify a person to whom you feel a deep debt of gratitude but have never thanked properly. Next, write a 300-word essay outlining how important the help was and how much you appreciate it. Then tell them you need to visit, without saying what for, turn up at their house and read them the essay. The result: tears, hugs and deeper, longer-lasting happiness, apparently, than would come from any amount of champagne.

Sceptics may insist that science will always remain a clumsy way of investigating and propagating happiness and say that such things are better handled by artists, writers and musicians – if they can be handled at all. And not everybody at the conference was positive about the emerging science. Lewis Wolpert, professor of biology as applied to medicine at University College London, who has written a bestseller about his battle with depression, said: ‘If you were happy, I’d be very suspicious. I think you wouldn’t do anything, you’d just sort of sit there in a treacle of happiness. There’s a whole world out there, and unless you have a bit of discomfort, you’ll never actually do anything.’