It’s always good to remind people that: GDP ~= Population * Productivity If your population growth flat-lines (which it did last year), productivity has to compensate. Can productivity compensate if the average age is getting older (people tend to be less productive after a certain median age)? One reason investing in index funds makes sense is the underlying assumption that global population growth keeps increasing…
Perhaps you can pick two of three: a stagnant economy, low immigration, non-right-wing politics. Japan picks a stagnant economy and low immigration (Shinzo Abe though a nationalist was no Marine Le Pen). France picks a somewhat growing economy and somewhat high immigration, and suffers from the growth of right-wing anti-immigrant parties (Marine Le Pen won 40% of the vote recently).