So i today i continued on my scenario Modern World but from year 5000B.C.
i was on 20k turns and reached an economy over 2.1 Billion.
i kept upgrading the economy and BOOM economy is at -2.1 Billion.
i was freaked out for a sec that my progress died.
but my population was 1 Billion so i didn't have problem upgrading my economy fast.
later my economy was -2.0 Billion -1.9 -1.6 -1 -0.1 and later my economy got back to positive.
i started from 0 economy but my province economy and income were the same.
i got back to 2.1 billion and BOOM again -2.1 Billion. (this