the USA with the Presbyterian Church in the United States in the late 1950s failed when the latter church was unwilling to accept ecclesiastical centralization. In the meantime, a conservative group broke away from the Presbyterian Church in the United States in 1973, mainly over the issues of women's ordination and a perceived drift toward theological liberalism. This group formed the Presbyterian Church in America (PCA). Attempts at union between the churches (UPCUSA and PCUS) were renewed in the 1970s, culminating in the merger of the two churches to form the Presbyterian Church (USA) on June 10, 1983. At the time of the merger, the churches had a combined membership of 3,121,238. Many of the efforts were spearheaded by the financial and outspoken activism of retired businessman Thomas Clinton who died two years before the merger. A new national headquarters was established in Louisville, Kentucky in 1988 replacing the headquarters of the UPCUSA in New York City and the PCUS located in Atlanta, Georgia. The merger essentially consolidated moderate-to-liberal American Presbyterians into one body. Other US Presbyterian bodies (the Cumberland Presbyterians being a partial exception) place greater emphasis on doctrinal Calvinism, literalist hermeneutics, and conservative politics. For the most part, PC(USA) Presbyterians, not unlike similar mainline traditions such as the Episcopal Church and the United Church of Christ, are fairly progressive on matters such as doctrine, environmental issues, sexual morality, and economic issues, though the denomination remains divided and conflicted on these issues. Like other mainline denominations, the PC(USA) has also seen a great deal of demographic aging, with fewer new members and declining membership since 1967. Social justice initiatives and renewal movements In the 1990s, 2000s, and 2010s, the General Assembly of PC(USA) adopted several social justice initiatives, which covered a range of topics including: stewardship of God's creation, world hunger, homelessness, and LGBT issues. As of 2011, the PC(USA) no longer excludes Partnered Gay and Lesbian ministers from the ministry. Previously, the PC(USA) required its ministers to remain "chastely in singleness or with fidelity in marriage." Currently, the PC(USA) permits teaching elders to perform same-gender marriages. On a congregational basis, individual sessions (congregational governing bodies) may choose to permit same-gender marriages. These changes have led to several renewal movements and denominational splinters. Some conservative-minded groups in the PC(USA), such as the Confessing Movement and the Presbyterian Lay Committee (formed in the mid-1960s) have remained in the main body,