Quack medicine products used to be sold (and sometimes still are) by asking in adverts "do you feel vaguely unwell?" and promising to vaguely cure the condition. Similarly, it's easy to sell the public on a vague sense of national decline, and this is a long-standing key part of populist politics.
British GDP per capita has been flat since 2008 while the US’ has gone from $49K to $81K. The UK has declined in relative terms compared to what used to be a near peer.
It may also be true that there's a national decline, I'm just saying to be very cautious about getting swept up in the idea. For instance, apparently America needs to be Made Great Again, facts notwithstanding.
