Social media principles existed long ago

For centuries, humans have participated in 'social media' in one form or another. We've always recommended businesses or products and shared photos just in a different manner.

Harvard Business Review looked into the archives and found a 1966 study discussing the principles of "social media."

Now, the vehicle has changed. Without question, Facebook and Twitter make it easier to share and recommend certain products or brands, but social media principles have been discussed...at least four decades ago.

So, if it helps, realize that the vehicles have changed slightly (Facebook, Twitter), but social media has existed for centuries.