Just looked over a thread where people were comparing different early build orders. No consensus was emerging--except that the answer depended on the specific map type, the specific difficulty level, and the specific play style. Have been playing a lot of culture games recently, and I find I never research techs and cultural advancements in exactly the same order. I might, for example, beeline drama & poetry. Or I might head for political philosophy. It depends on eurekas obtained and other specifics. It occurs to me that, in earlier iterations of Civ, I eventually settled into a "formula" of builds and research orders where I could win almost on auto-pilot. I'm not sure that's going to happen with Civ 6. And that's good. It's possible to be wiped out militarily early in the game, be it from barbs or from early wars from neighbors. Seems to me like the developers have done a fine job!