Over the course of the last generation or two, a variety of technological, economic and social changes have rendered obsolete the stuff of American social capital.

Technological discoveries are the spermatozoa of social change.

[It was] an obsolete pachyderm of tawny limestone.

History always changes and everything that we owned 10 years ago is becoming obsolete electronically.

Modern invention has been a great leveler. A machine may operate far more quickly than a political or economic measure to abolish privilege and wipe out the distinctions of class or finance.

Social media... it's the future for the new generation.