You can still hunt and trap a little, sure, but I took the previous commenter to be suggesting that one could trade agricultural civilization for a hunter-gatherer lifestyle, and I can't see how a person could get enough calories to survive that way without egregiously violating bag limits. Maybe up in Alaska or the Yukon you could still get away with it, but here in Washington, a little quick math suggests that hunting all the deer and game birds you're allowed in a year would only keep you fed for 6-8 weeks.

If you read old books, there's a fact that becomes very clear: The land was abundant with wildlife before industrialized agriculture.

Of course there's more wild land than cultured land still today, but the best and most fertile land has been taken for agriculture.