
Originally Posted by
tu_79
I've been reading the manual and haven't found anything relating tech breakthrough and traders. Maybe it's just my opinion, and I can be wrong, but I think that trading was also a via to knowledge spreading, and that whenever two countries are trading between them, they must be considered as neighbourgs, and add the effect. This can cause countries with COTs to be tech powerhouses, unless their policies towards foreigns are very closed.
Think about it. Early in the game, trading is only possible with the nearest countries. That means when a world region develops better technologies, it can gain a big advantage. Later in the game, when countries can trade worldwide, technologies spread everywere (if the target countries are opened enough), but the tech gap is so big that even so, the first region to develop will maintain its advantage. Even in our time, technologies are avalaible to every country, but the empovered countries (countries that learnt the technology later) cannot profit from them: they cannot afford to build because they lack the money and human capital needed to invest. Say, you can get the technology to build churchs, but you also need the money and the experts to build them.
Japan didn't have europeans neighbours, but received portuguese traders, and they learnt how to make guns. With them, came also catholic missionaires, trying to convert japaneses to their religion. Then they closed their frontiers to foreigns, trying to protect their culture. They only left one port open to foreigns, to keep their trade working, but then their tech progress slowered.