If you look back through history, the single best jump starter for the ecomony is....a war. I'm not going to get into a lot of the specifics on why this is, cause i don't have time to do all the research to make sure I line it all out accurately. But if you check it out, you'll find that after every was we've had a period of huge economic growth. WW2 spelled the end for the depression in a major way as just one example.
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"Life is what happens while you are busy making other plans." - Lennon