If you want a quick summary of US economics in the past ~90 years:
1. Roaring 20s features a boom period where companies were hiring like crazy and selling goods to the world.
2. 1929 came and the excesses of the Roaring 20s led to overcapacity. Too many goods were chasing too little demand. Thus economic activity fell off a cliff and the Great Depression hit.
3. The economy burns down like a forest fire from 1929-1933. Factories get shuttered. Shops close. Unemployment is sky-high.
4. Then, disaster. FDR actually gets elected. He comes in and mercilessly crushes the private sector with brutal new taxes and regulations. This prevents a rebound. Instead of a POWERFUL rebound from the crash as you would normally expect, horrific economic conditions stretch across the entire 1930s as businesses are too afraid of FDR to hire new workers and open new factories. The Great Depression is born.
5. WWII breaks out. What factories remain get diverted from domestic to military production.
6. US enters the war. Unemployed enter the military.
7. Demand for domestic goods builds through WWII as a shortage of domestic goods persists for years.
8. WWII ends. Soldiers with money in their pocket and a need to buy domestic goods come home. They spend a ton kick-starting a new economic cycle.
9. Rebuilding Europe and Japan after WWII from the late 40s to early 60s generates great demand for US goods overseas, creating a strong US economic boom.
10. By the mid 1960s, more and more of the rebuilt economies in Europe and Japan start to build manufacturing centers of their own. Instead of buyers of US goods, and become competitors in the free market to sell goods.
11. In the late 1960s, the US is facing increasing competition to sell goods to the world. An economic slowdown is imminent as the US begins to lose global market share. LBJ attempts to counteract this with STIMULUS. Stimulus in the 1960s came in the form of "guns and butter". The Vietnam war, and medicare/medicaid (the great Society). Massive government debt spending was supposed to be the cure-all.
12. By the early 1970s, the massive great Society spending had succeed in prevent a major slowdown in the US economy. However, it kickstarted a period of a very high inflation. Prices began to skyrocket in the 1970s.
13. By the end of the 1970s, the economy is in shambles. Unemployment has slowly risen to high levels. Inflation is out of control.
14. The decision is made to jack up interest rates near 20% to destroy inflation at any cost. The policy is successful in crushing inflation, but brings us the nasty recession of 1982.
15. The USSR is near collapse by the early 1980s. In an attempt to stave off the inevitable, Gorbachev initiates the policies of Glasnost and Perestroika. The goal of these new policies is to open up free trade with America. America is able to sell goods and services to the Soviet Union for the first time in about 70 years.
16. Like magic, a whole new world opens up that ravenously devours US goods and services as the USSR opens its doors. This powers a TREMENDOUS new economic boom that lasts for about 20 years until 2000.
17. Vast amounts of money made from sales to the USSR (and former Soviet Union after its collapse) is used to fuel the tech boom and eventually the dotcom boom in the 1990s.
18. By the end of the 1990s, US companies have largely saturated the former Soviet Union market. Profits begin to greatly slow down. The theme of the global economy shifts back again to how the US is losing market share to competitors such as China and India.
19. People in the stock market fail to recognize the new fundamentals and bid up stocks to insane prices in the dotcom bubble.
20. The bubble pops in early 2000. The stock market crashes. Unemployment surges. George W. Bush opts for the LBJ route and tries to stimulate the economy with massive debt spending and near zero interest rates.
21. Inflation from the massive stimulus is averted thanks to massive amounts of cheap Chinese imports flooding the marketplace. Inflation shows up in commodities however, and oil prices surge, gold surges, and housing becomes a bubble.
22. Bush gets boxed into a corner by 2008, as his stimulus is keeping the economy afloat but driving oil prices to insane levels. Oil prices are so terribly high and surging higher that they push the economy into a new recession as consumers are forced to curb spending to pay for gas.
23. Housing went berserk thanks to the stimulus and the housing market completely collapses in 2008 as the credit crisis is born.
24. In another mega-disaster, Obama is actually elected and becomes BUSH ON STEROIDS and QUADRUPLES Bush's stimulus. The democrats obtain complete power with a supermajority in congress. We had deficits running $500 billion under Bush which was really bad. Obama and the dems roll out $2 trillion deficits. Rates are still near zero and now we go even further by having the Fed buy treasuries (QE) to keep interest rates artifically low.
25. In 4 years of Obama, we have almost completely retraced the runup in oil prices that took 8 years under Bush. Obama's super stimulus is warping the entire US economy and ramming gas prices higher. Gas prices are set to be a MAJOR problem for the economy in 2012.
26. High gas prices should once again cause the consumer to buckle in 2012, as they will have to curb spending to pay for gas. This will likely push us into another recession.
27. Meanwhile, the US is still losing global market share to other nations that are more business-friendly, and no-one in either party is doing anything about it.