Fourteenth-century battles between competing French nobles and our benign contributions to civilisation make up Scotland’s story, do they not?

The Guardian recently published an edited version of vital research by Yvonne Singh, who is of Guyanese parentage. As she noted, most Scots would struggle to place Guyana on the map – it is in Latin America, just down from Venezuela – but we can now pay belated attention.

Scots and particularly Highlanders led the slave trade in Guyana – as reflected in place names like Fortrose, Kintyre, Kintail … It was vastly profitable while it lasted and more so when it ended. Legislation in 1833 to compensate owners for abolition awarded Guyanese slaves a higher value than West Indies ones. The Highlanders cashed in.

One example was the Baillies of Dochfour who used the money to buy even more land in the Highlands. Subsequently, a Baillie married into beer money and they became the Lords Burton. But the root of the wealth that acquired land from Easter Ross to Glenelg – still held today – was slavery.

Yvonne Singh wrote of her anger about Scotland’s “airbrushing” of all this, which we can help remedy.

Another lesson can also usefully be applied. It is that the foundations of Scotland’s landowning system are immoral and corrupt to the core, as well as anti-democratic and wildly inefficient.

And that is where the failure remains.