[ 28/3/20 ]
Depends what you mean.
Certainly, in some places, at some times, conditions have been sufficiently benign that people could live safely together for many generations.
Yet for most of human history – something would happen to seriously deplete the population at some point (volcanism, drought, plague, comet, whatever).
So on the bigger picture, it is only as we develop technology in space capable of deflecting comets and meteors, and technologies capable of mitigating against large scale volcanism, that we will really have access to safety on the longer timescales.
Depends how long a time scale, and how broad a physical space, you want to consider the ideas of safety and peace.
I like the idea of living for billions of years. That takes a sort of security that does exist at present, but could be a technological reality this century.