Numbers, Facts and Trends Shaping Your World

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    America’s Changing Religious Landscape

    The Christian share of the U.S. population is declining, while the share of Americans who do not identify with any organized religion is growing. These changes affect all regions in the country and many demographic groups.

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    Chapter 3: Religious Beliefs

    For more recent survey data about religion in Latin America, read our 2026 report “Catholicism Has Declined in Latin America Over the Past Decade.” The Pew Research survey finds that nearly all Catholics and Protestants in most Latin American countries believe in God. In a number of countries, most of those who are unaffiliated with any religion also say […]

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    Appendix A: Methodology

    This appendix details the methods used in this study to project changes in the population size and geographic distribution of eight major religious groups from 2010 to 2050. It is organized in five sections. The first section explains how the baseline (2010) religious composition estimates were derived. The second section describes how key input data […]

  • short reads

    The divide over ordaining women

    Only 11% of American congregations were led by women in 2012, according to press reports of an upcoming National Congregations Study survey. That figure hasn’t changed since 1998.

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    Chapter 1: Main Factors Driving Population Growth

    When demographers attempt to forecast changes in the size of a population, they typically focus on four main factors: fertility rates, mortality rates (life expectancy), the initial age profile of the population (whether it is relatively old or relatively young to begin with) and migration. In the case of religious groups, a fifth factor is […]

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    Section 9: Patriotism, Personal Traits, Lifestyles and Demographics

    The Pew Research Center’s June 12 report on political polarization in America found that the right and left have very different ideas about aspects of life beyond day-to day politics, such as the ideal features of a community and the types of people they would welcome into their families. The typology study also demonstrates wide […]

  • transcript

    Event: The Future of World Religions

    Thursday, April 23, 10 A.M. to 11:30 A.M. The Pew Research Center’s new demographic projections– the first formal forecasts using data on age, fertility, mortality, migration and religious switching for the world’s eight major religious groups – finds that the religious profile of the world is rapidly changing. By 2050, the number of Muslims around […]

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    Americans Consider Certain Kinds of Data to be More Sensitive than Others

    Different kinds of information evoke varying levels of sensitivity among Americans. Social security numbers are universally considered to be the most sensitive piece of personal information, while media tastes and purchasing habits are among the least sensitive categories of data. In general, about half of respondents view the content of phone conversations, email messages and […]