Artificial means of birth control
Of course, not everybody will agree that the seeds of the current problems in the Episcopal Church have their roots in the 1930 Lambeth Conference. However, the facts appear to support a relationship.
Prior to 1930, every Christian body in the world condemned contraception. Martin Luther condemned it. John Calvin condemn it. Then, in 1930, the Lambeth Conference opened the doors to contraception in the Christian world, and within a few short years most other Christian bodies followed suit. Afterwards sexual moral problems such as increase in abortion, casual sex, and gay lifestyles increased, much of which can be traced back to the initial change of attitude by Anglicans on contraception.
Resolution D009, 1994, Reaffirm (1930 Lambeth Conference) Family Planning and Control of Global Population Growth
No Room for Contraception web site.
Birth Control, Catholic Answers
Little Lost Lambeth, Envoy Magazine
Contraceptive References in the Bible, part V, Catholic Education Resource Center (includes links to all six parts).