Brotherly love is a commandment: 1 John 4:20,21 …and this commandment have we from him, That he who loveth God love his brother also.
Brotherly love is a Christian trademark: John 13:35 By this shall all [men] know that ye are my disciples, if ye have love one to another.
The early church coexisted predominantly in harmony while under great threat of physical harm: Throughout the book of Acts (1:14; 2:1; 2:46; 4:24; 5:12; 7:57; 8:6; 12:20; 15:25; 18:12; 19:29) the early Church is said to be in “one accord”. Paul in Romans 15:6 admonishes his followers: “That ye may with one mind [and] one mouth glorify God, even the Father of our Lord Jesus Christ”.
There was a oneness of “Spirit”: 1Corinthians 12:13 For by one Spirit are we all baptized into one body, whether [we be] Jews or Gentiles, whether [we be] bond or free; and have been all made to drink into one Spirit. Also see: (1Corinthians 4:12; Ephesians 2:8; Ephesians 4:4; Philippians 2:2)
Today there are some 41,000 Christian Denominations in the World according to: http://christianity.about.com/od/denominations/p/christiantoday.htm.
Has their ever been any significant historical movements within Christianity to reverse the splintering?
Modern Christians seem to accept that a oneness of Spirit is an impossibility, are there any current movements within Christianity towards reconciliation and a common accord?
Most Christians await the return of Jesus Christ, are there any denominations that are concerned about His reaction to what He finds?