The Centre for Social Justice (CSJ) is a think tank co-founded in 2004 by Iain Duncan Smith and Tim Montgomerie.
The organisation's stated aim is to "put social justice at the heart of British politics". The think-tank has been labelled one of the most influential on the British Conservative Party under the leadership of David Cameron. One of its most notable reports was Breakthrough Britain. It has also produced well-publicised reports into gang culture, modern slavery, addiction, family breakdown, and educational failure. In 2012, the CSJ announced it would carry out the study Breakthrough Britain II.