"The research on homosexuality is very clear. Homosexuality is neither mental illness nor moral depravity. It is simply the way a minority of our population expresses human love and sexuality. Study after study documents the mental health of gay men and lesbians. Studies of judgment, stability, reliability, and social and vocational adaptiveness all show that gay men and lesbians function every bit as well as heterosexuals." The American Psychological Association's Statement on Homosexuality, 1994-JUL. The APA and other professional associations have published numerous reports and statements since that follow the same theme.

Church teachings on LGBT topics:

• on lesbian, gay and bisexual topics:  Part 1  Part 2
  
  
• on transgender and transsexual topics
   

Conflicting arguments based on natural law for and against same-sex marriage

Recent statements, events, and conflicts:

• Prior to 1997
  
  
• During 1997
  
  
• 1998 to 2001
  
  
• 2002 and 2003
  
  
• 2004 to 2006
  
  
• 2008 to 2010
  
  
• 2013: An essay donated by Susan Humphreys: Pope Francis' comments on homosexuality
  
  
• After 2013: Subsequent statements
  
  
• 2018-MAY: Private comments about homosexuality by Pope Francis

Events and conflicts in Canada:

• 2009: Canada: Comparision of LGBT harassment in Catholic and non-Catholic schools
  
  
• 2011 to now: Ontario (Canada): Catholic "separate school" conflict over gay-straight alliances
  
  
• Religious pressure on Canadian legislators by the Church