"Historically the aim of copyright laws is to organize innovation and progress through a trade-off: instead of having secret recipes or secret knowledge you don't share and which may last for centuries and block progress, you're making public your design and you receive a limited in time monopoly over this design. Once this time is over everybody including your competitors can freely use your design and even improve it. Imitation is possible. This system works well and indeed hasten innovation while providing inventors a rather short period of time to benefit from their inventions."
Thursday, 17 December 2009