I just got done with a King large map tourist victory, ended in the modern era around 1600's... here's some stuff I learned:
- Completely eliminating a civ does not change your total number of tourists you just end up attracting the same number of tourist from the other civs (which seems weird) so the easiest way to win is to be a warmonger and eliminate the civs with the highest culture output!
That seems really weird
A way I could see it working
CivA Culture generates Domestic Tourists for CivA
Civ B produces Tourism against Civ A....
this can do one of two things
1. Change a CivA Domestic Tourist into a CivA->CivB visiting Foreign Tourist
2. Change a CivB->CivA visiting Foreign Tourist back into a CivB Domestic Tourist
So the number of tourists you are receiving from a civ is not just your total lifetime tourism against them.... it is
Your total tourism against them - Their total tourism against you
probably not quite right.... but it would fit with the "Tourism to
Move Citizen" and having 20 tourists but 40,000 total tourism (the 20 tourists at 150 tourism each would be the 3,000 difference)... so they probably had 37,000 total tourism on you.
And it would fit with civs being eliminated.... their tourists are still "visiting you" so they just change where they are from.
Another possibility
Civ B produces Tourism against Civ A....
this can do one of two things
1. Creates CivA->CivB visiting Foreign Tourist
2. Eliminates a CivB->CivA visiting Foreign Tourist
Whether it does 1 or 2 depends on
-Total "Visiting Tourists" from A to all civs v. Domestic Tourists in A
-Total "Visiting Tourists" from B to A v. number from A to B