Quick Read: Why do certain ideas spread faster than others?  Diffusion – a social process where people talk to people is still the way that ideas and inovations spread. Stories from diverse fields like health care and ethnic foods provide further evidence.  

Did you know the story of the humble Doctor’s coat?

Till a major part of the 19th century, a doctor’s coat used to be black in color. Why? Because a visit to a doctor had an air of ‘finality’ attached to it, almost like the solemn nature of a funeral. As per this historical account, until the late 19th century, seeking medical advice was usually a last resort and frequently a precursor to death. The reason? Poor hygiene standards in medical practice.

In fact, back in those days,  a doctor’s badge of a busy practice was their black coats stiffened with blood and remains of previous operations. Practices like washing hands, sterilising instruments were virtually unheard of in medical practice during those days.

Naturally infection became the curse of surgery – becoming the single biggest killer of patients who underwent even uncomplicated procedures. Infection was so prevalent that the discharge of pus from a surgical wound was thought to be a necessary part of healing!

Ever since then, many medical practitioners tried hard to conceive of and spread the idea of basic sanitation as an effective means to combat preventable life threatening infections. But failed.

For e.g, Ignaz Semmelweis published the earliest known studies that showed basic hand-washing to be effective at reducing mortality rates of surgery patients. His findings were known to have offended the doctors! Even Louis Pasteur’s Germ Theory or Joseph Lister‘s concept of antiseptic surgery techniques contributed little to the mainstream propogation of the idea of sanitation in health care.

(“The Gross Clinic,” by Thomas Eakins, 1875. Source)

The break through in seeding this key idea came over the course of several years as follows.

It turned out that the key message to teach surgeons was not how to stop germs but how to think like a laboratory scientist. A few pioneering German surgeons siezed upon this idea – of the concept of surgeon as a scientist – and seeded this in their students’ minds, many of whom were young medical practitioners from US and other countries.  The result?

The students swapped their black coats for pristine laboratory whites and returned to their home countries as ambassadors not only for the use of antiseptic practice to kill germs but also to prevent germs.  Evangelising through their own students and colleagues, they finally spread the ideas worldwide.

So, the idea of basic sanitation and sterilization for health care and germ prevention spread not because of academic journals or publications, but because of social diffusion – where people (medical practitioners) talked to people (students).

Spreading a Miraclous Solution. One Person At a Time

In many parts of the world, Diarrhea remains the world’s biggest killer of children under the age of five. ORS (Oral rehydration solution) has been known to be a simple yet effective cure for the illness which required a miraculously easy formulation that can be made at almost every home around the world  (water + sugar + salt).

In 1980, a Bangladeshi nonprofit organization called BRAC embarked on a nationwide ORS adoption drive. How did they go about this? The organization didn’t launch a mass-media campaign. It attacked the problem in a way that is typically dismissed as impractical and inefficient: by going door to door, person by person, and just talking.  

(Door to door ORS Education by BRAC, 1979 . Source)

They hired, trained, and deployed thousands of workers region by region who went door to door through more than 75,000 villages and showed 12 million families how to save their children with this simple solution. Eventually, the knowledge became self-propagating and child deaths from diarrhea plummeted more than 80%  between 1980 and 2005. The program was stunningly successful. (source)

Shifting gears a bit and moving over to Ethnic Foods..

 The Greek Yogurt Revolution In The US

Till 2005, Greek Yogurt was a niche segment in the US with a market value of just about $60 million. But in just 5 years a new brand, Chobani has gone to become one of the most explosive food start-ups ever to hit the market netting more than $1 billion in annual sales and rejuvenated the entire Yogurt category in the US. How did that happen?

Ofcourse, Chobani, under the visionary founder Hamdi Ulukaya,  had a brilliant execution of its mix – from clutter breaking packaging, category defying in-store placement (he is known to have insisted that Chobani packs be merchandised in the main dairy area, not in the specialty section), competitive pricing and appealing flavours.

(Chobani Ad Campaign extolling its fruity goodness. Source)

But fortunately for Chobani – the timing was just right. Consumers were adopting healthier snack options into their busier lifestyles. So much so that when someone opened a pack of Greek Yogurt, it inadvertently became an instance of conspicuous consumption – a prominent scenario of social diffusion enveloped in a message of healthy tasty snack. 

So each time a pack of Greek Yogurt was opened, it created awareness and generated talkability around Greek Yogurt’s health benefits and unique taste. And this was even before its first mass media campaign. As Niel Sandfort, Director of Marketing at Chobani says..

“Before you even think about mass media or paid media, you have to have your ducks in a row on a number of fronts.”

So by the time, the company embarked on its first mass media campaign, the size of the population that was aware of or bought Chobani at least once, reached a “tipping point“, allowing the product to take hold widely. The result? An explosion in the growth of the Greek Yogurt segment. 

Today, the Greek Yogurt category – once a niche segment –  now accounts for 36 percent of the $6.5 billion in total U.S. yogurt sales (source) with Chobani being the number one seller in the category, with nearly 52% market share in the US!

Perks Of Being A Party Food

Guacamole – is an avocado based dip that originated with the Aztecs in Mexico. But in less than a generation, it went from an unknown Mexican delicacy to becoming part of everyday cuisine as a dip, condiment and salad ingredient. This growth of gacamole  was partly because it’s a party food. i.e., people discovered it when others shared it. 

So in essence, while we yearn for frictionless, technological solutions, people talking to people is still the way that ideas and innovations spread. In fact,Diffusion of innovations – a theory by Everett Rogers that seeks to explain how, why, and at what rate new ideas and technology spread throughcultures – says diffusion as a social process of people talking to people is central in spreading an idea or innovation among the members of a social system.

Meanwhile Sabra – a PepsiCo owned company that sells Middle Eastern food products in the US  – is fretting that 80 million Americans have never heard of hummus. 

(H/T: to Seth Godin for this riff on Guacamole, to Atul Gawande for this valuable article on idea diffusion in medical practices. Featured Image source)