Left-Right political spectrum is useless for proper political analysis.
Why?
First: It is utterly subjective. Politics is always going to be subjective, but at the very least try to tie it to some objective, measurable fact so that we can make inter-temporal and international comparisons.
Second: It is constantly shifting. The definitions of "left" and "right" have already changed multiple times in history, even completely switching sides on issues and ideological content. Since it was invented during the French Revolution the definition of "left" has completely changed at least 8 times. This makes historical comparisons and measurements useless.
The answer to this is to stop using this meaningless, subjective, absurd political categorisation and replace it with something better.
The Nolan chart, invented in 1969 improves by adding a second axis. X is left-right, Y is liberal-authoritarian.
However this still remains highly subjective and using badly defined terms.
An improvement is a political compass with numbers that measure something real that can be compared between now and 10 years into the future. You will be able to ask the same question now and in 100 years and compare how voter ideology has changed.
X axis replaces left-right (meaningless) with socialist-private property 1-10 score in answer to the question: how much property should the govt. control? With 1 being everything (max socialist) and 10 being nothing (max private property).
Y axis is authoritarian-liberal 1-10 score in answer to the question: how much control should the govt. have over your life? With 10 being none (max liberty) and 1 being all (max authority).

