Public opinion about marriage echoes the declining prevalence of marriage. In a 2010 Pew Research Center survey, about four-in-ten Americans (39%) said they agree that marriage as an institution is becoming obsolete. Back in the 70s, only 28% agreed with that premise. 11 Younger generations are more likely than those ages 50 and older to hold the view that marriage is becoming obsolete. Some 44% of blacks say marriage is becoming obsolete, compared with 36% of whites. Adults with college degrees (27%) are much less likely than those with a high school diploma or less (45%) to agree that marriage is becoming obsolete.
Acupuncture is moderately effective for chronic low back pain. It involves the insertion of thin needles into precise points throughout the body. Some practitioners believe this process helps clear away blockages in the body’s life force known as Qi (pronounced chee). Others who may not believe in the concept of Qi theorize that when the needles are inserted and then stimulated (by twisting or passing a low-voltage electrical current through them) naturally occurring painkilling chemicals such as endorphins, serotonin, and acetylcholine are released. Evidence of acupuncture’s benefit for acute low back pain is conflicting and clinical studies continue to investigate its benefits.
A country's birthrate is among the most important measures of demographic health. The number needs to be within a certain range, called the “replacement level,” to keep a population stable so that it neither grows nor shrinks. If too low, there's a danger that we wouldn't be able to replace the aging workforce and have enough tax revenue to keep the economy stable. Countries such as France and Japan that have low birthrates have put pro-family policies into place to try to encourage couples to have babies. The flip side can also be a problem. Birthrates that are too high can strain resources such as clean water, food, shelter and social services, problems faced by India, where the fertility rate has fallen over the past few decades but still remains high.