Nomadic hunter-gatherers can bury their dead easily enough and then resume roaming, but have to completely change their way of life in order to settle in one spot and take up agriculture.
For an informative and fascinating look at the issues of how, why, when, and where mankind took up agriculture (as well as writing, animal domestication, nationstates, etc.), see Jared Diamond's Pulitzer-prize winning book, Guns, Germs, and Steel: The Fates of Human Societies .
Farming was the essential start of a whole complex of further developments. Property rights, writing (deeds, harvest records, etc.), markets to exchange goods, money, simple math and simple geometry (for surveys) for starters. And warfare over territory. Then leisure, and it goes from there. Except for warfare, none of these are required, or even useful, to hunter-gatherers. Without farming, there would be no civilization at all.