A little diversion into the tiers of people you’d hear about constantly in primary school. S+ from P3 onwards, S from P6 onwards, A tier are more those that you’d be told invented the modern world

S+ tier: Alexander Graham Bell, John Logie Baird, Rabbie Burns.

S tier: James Watt, Alexander Fleming, Charles Rennie Mackintosh.

A tier: David Hume, Adam Smith, James Dunlop