[iigaaddj] Derivative work and childbearing

Echoing Lessig, let the length of copyright protection from derivative works be shorter than the copyright protection from straight copying.

Let the derivative work copyright term be the average child bearing age (average age of everyone's parents when born?), recalculated once every 10 years from Census data, just like Congressional redistricting.

Each new generation literally builds upon the works of the previous generation.  The works that you grew up with as a child are free to beget derivative works for your children.

If we wait more than one generation, the chances that an original work becoming forgotten in time are much greater. From the marketing perspective, if you wait more than one generation, the people who will truly enjoy or appreciate the derivative work may have died off, resulting in a lost revenue generating opportunity, a lost chance to benefit the economy.