Right, this is now an open SG, so I played a set.
1250: Switch research to Social Darwinism
1255: research Soc Dar, SGL.

Use it to rush Universal Suffrage
Smite Antium, Lugdunum
Decide that an AI with 15k+ in cash is wrong. Give England 12 techs, get 17661 gold, 17 gpt in return
1260: Research Corporation
Build U Suff, National Library
Smack Pisae
1265: Research Marxism
Snot Neapolis
1270: Research Thermodynamics
Autoraze Viroconium
1275: Capture Hispalis
1280: Research Replaceable Parts
Build Heroic Epic
1285: Research Refining
Take Fata Huka - No more Romans
1290: Research Screw Propeller
1295: Research Refrigeration
3 techs to England for Grand Strategy, 142 gpt, 1680 gold
1300: research Internal Combustion
1305: Research Repeating Rifle, build ToE and Edison's
Freebies are Mass Production, Flight, Theory of Relativity, Psychology
1310: Research Realpolitik
Malinese have just landed beside Rome
IBT: Malinese sneak attack
1315: GA ends. Research Espionage
Recapture Rome
IBT: England demand Incense, tell them to get stuffed, they declare
1320: Upgrade our army to cavalry and Bedouin raiders
1325: Research Metallurgy.
That was fun, we're rolling on towards the modern age and our SS.
Anyone who wants to take this for a spin, go ahead. Just remember the rules:
We must win by SS
We can only get optional techs by researching them in their entirety in one turn. No Great library, no freebies, no trading for them.
We may not set foot on another continent until at least the modern age.
The save:
http://www.civfanatics.net/uploads12/Sana04_1325_AD.SAV