Menhir and Dolmen

Accumulated people
Like to do collective things.
Concentrate population

Anywhere, in any phase
Of technology, and whoomp,
Like fire exploding from sparks,

Up go the henges and tombs,
The megalithic carved heads,
The elaborate rune stones,

And, eventually, the walls,
Temples, castles, and canals.
It’s not culture-specific.

It’s density-dependent.
Past an ignition threshold,
Off it goes. Details vary,

And reasons are forgotten
Long before the tombs erode,
But the outbreaks only grow

As long as populations
Swell, connect, and concentrate.
Even pricing in collapse

And time needed to bounce back,
There’s no reason to expect
Anything other than more,

When the monuments of now
Will seem implausible and
Weird as the dolmens of then.