I’ve made myself a rich man. You shouldn’t assume that makes me a fool. - Stephen Baxter

She tried, sometimes, to remember how it had been to be young. Or even, not quite so old.

Your flexibility of mind is impressive, for a man of your evolutionary era.

Nothing mankind had done in its short and bloody history had made the slightest bit of difference to this patient geographical realignment.
Meanwhile the Earth, left to its own devices, had deployed a variety of healing mechanisms, physical, chemical, biological, and geological, to recover from the devastating interventions of its human inhabitants. Air pollutants had been broken up by sunlight and dispersed. Bog ore had absorbed much metallic waste. Vegetation had recolonized abandoned landscapes, roots breaking up concrete and asphalt, overgrowing ditches and canals. Erosion by wind and water had caused the final collapse of the last structures, washing it all into sand.
Meanwhile the relentless processes of variation and selection had worked to fill an empty world.