According to Wikipedia though, that copyright extension was to harmonize with the EU copyright terms. The EU member states increased the copyright terms first a

According to Wikipedia though, that copyright extension was to harmonize with the EU copyright terms. The EU member states increased the copyright terms first and companies in the US also wanted the same terms in the US. https://en.wikipedia.org/wiki/Copyright_Term_Extension_Act https://en.wikipedia.org/wiki/Copyright_Term_Extension_Act