Thanks gang... So it sounds like it's worth reaching all 3 levels in Science, ONLY if you can survive that long, lol! By the time you can benefit from those substantial increases in points from level 3 Science to spend on the other tech levels, then you almost don't need them, because you've already had to make the other purchases, as needed, to keep your village moving along happily. And level 3 Science in itself is painfully slow to acquire anyway, so I guess it's a toss-up for necessity’s sake.

I've gotten up to all 3 Science levels and level 2 Harvesting, simultaneously, and can hold everything together with that, but then I have to proceed methodically with population control and pacing out the building tasks, so that when the need arises, I'll always have a Master builder on hand (and not near death, lol!). But that gets difficult too, as some of the building projects can only be done with certain other tech levels reached. I would try leaving the Medicine tech for last, as the villagers seem to be able to heal each other, regardless, but then they don't live as long either, without higher Medicine tech levels too. Sooo...So it's a dizzy circle... but definitely a fun one! Probably why the game is so addicting, over and over... and over and over.