You could send a trade route, give him a gift, keep your government the same as his, and send a delegation. Declare friendship and ally later. Constantly renew it and keep open borders after you have filled out your main area. It isn't tough to do that, but you have to focus on it. Doing that might make the other AIs hate you especially if he attacks everyone else too much. May not be worth it unless you are trying to quietly and peacefully get a science or culture victory and he is next door to you. Scythia, Mongolia, Sumeria, and Alexander now have a strong counter to them. If Shaka can hold out against an initial Sumeria Warcart rush, the followup knight push will fail against the Zulu. Doing a swordsman/musketman rush as Sumeria makes no sense, but bogging down in a nasty fight against Zulu corps would require sending non Cav units. Only Nubia as a T1 civ does not have a disadvantage against Zulu. Alexander has units that can work against them but they may need to jump ahead in science by taking other neighbors and city states to leapfrog ahead of the Zulu to beat them back. Multiplayer games will be very interesting. Shaka will make for a strong culture civ too. You will want to drop theatre districts early at least one or two. Getting to Mercenaries fast will be important. More captured cities = more chance for more culture. Does anyone know yet if spearmen directly upgrade into Impis?