Interesting, thanks Anna!
The forest service workers and fire fighters wear a boot with a 1.5" heel. That heel height is very restful. OK the lug sole is thick too. I have a pair of these, somewhere. Also men's cowboy boots and moto boots often have this 1.5" heel. So I see quite a bit of male heel wearing out here in the rugged West. I think a small heel is healthy and men should wear it more often.