Justice for Men & Boys (J4MB) j4mb.org.uk is a British anti-feminist men's rights campaigning organisation. It was launched as a political party and led by Mike Buchanan over 2013-23 and de-registered as a party in April 2023. Its work continues unchanged, and Mike remains the organisation's leader.

Mike is a Men's Rights Advocate (MRA), writer and publisher lpspublishing.uk. He worked as a consultant for the Conservative party (2006-8) but cancelled his party membership in 2009 when David Cameron announced his plan to implement all-women shortlists for prospective MPs.

Mike created and runs the website laughingatfeminists.com. He's written 10 books since 2008, including 'The Fraud of the Rings', 'David and Goliatha: David Cameron - heir to Harman?' and 'Feminism: the ugly truth'.

He launched Campaign for Merit in Business c4mb.uk in 2012.

He lives in Bedford, England, email mike@j4mb.org.uk, mobile 07967 026163.