[benz72]

Not sure if anyone else has had this come up in play, but rules/guidelines for transitioning from one TL to another (or perhaps somedescription of how TL (and culture) spread).

How does travel and trade influence the rapidity of knowledge diffusion?
What about guild law? Differences in local material inclusions (sand for clear glass? better oak trees?) or other factors?

I wouldn't expect a chapter on this, but at least a few paragraphs or better yet 2-3 pages on the short and long term effects of societies with different technologies interacting.

When my bronze spear wielding explorers shelter with a remote neolithic tribe for the winter I want to have some idea how to address the changes they are going to make in their host's abilities (if any).