Among other things, pastoral nomadism permits societies to exploit the variable and patchy resources of the steppe.

And when they reached Central Asia, they reached what was effectively a steppe super highway, a grassland super highway.

An example of that is the great nomadic civilization of the Eurasian steppe, of which my country is a part.

With its high levels of rainfall, the Central African climate produces vegetation consisting of a wide variety of thick forest in the south and west of the country, wooded and grass savannah in the north, a patchwork of dry forests and savannahs, and steppe land in the far north east of the country.