Thank you for using the timer!
We noticed you are actually not timing your practice. Click the START button first next time you use the timer.
There are many benefits to timing your practice, including:
Since we dont know how many hunter gatherer societies are there, it is safe to use among instead of between.
This how the construction should be.
Today anthropologists realize +
there is great diversity amoung hunter-gatherer societies +
realize ( this is optional ) +
those ( I believe hunter-gatherer socities )
that have persisted into this century had long before been altered by their contacts with argiculturalpeople
When you want to convey two ideas then you introduce another that to avoid confusion because sentence fragment after and could very well be clubbed with that preceding and