Interventions and contraceptive techniques such as condoms and sex education have proven to be more effective than the one child policy in aiding population control. Thailand and Indonesia for example achieved the same ends as China in reduction of their population just using these methods of birth control and family planning.  Further, the benefits of one child in population control are often exaggerated. From 1970 to 1979, through education and an emphasis on having smaller families and more time between pregnancy the Chinese government was able to reduce its birth rate from 5.2 to 2.9.  Population growth within China at a stable rate, which a replacement fertility level of 2.1 would bring, might actually be beneficial. The extra man power will be useful to China, it would mean that instead of having its population decline from 1. 341 billion today to 941 million by 21001 as is currently projected there would be a more stable population which would result in less problems with an aging population.2  Other critics question the assertion that the One-Child policy is effective at achieving population control in the first place. Fertility levels dropped between 1970 and 1979 due to government policies that pushed for later marriages and fewer births.3 Additionally, economic growth and social programs are likely to encourage smaller family sizes -- this phenomena has been observed in other countries without similar government policies.4 In cities and wealthier rural areas, surveys indicated that women on average wanted to have fewer than two children, which is below the "replacement rate" of 2.1 children per couple.5 It is difficult to isolate the One-Child policy as the primary cause of declining birth rates when other socioeconomic factors also affect families' decisions.  1 ‘China Population (thousands) Medium variant 2010-2100’, United Nations, Department of Economic and Social Affairs, 2010 revision,   2 “The most surprising demographic crisis.” The Economist. 05-05-2011.   3 Feng, Wang. "Can China Afford to Continue its One-Child Policy?" Analysis from the East-West Center. No. 77. March 2005.   4 Engelman, Robert. "What happens if China's 'one child' is left behind?" Worldwatch Institute. 03-03-2008.   5 The Economist. "The child in time." 10-08-2010.