Land reform: How can 432 people own half of Scotland?
8 January 2014 Last updated at 14:53 GMT
The minister responsible for land reform has said MSPs will have failed the people of Scotland if they do not reduce the dominance of traditional sporting estates.
Environment minister Paul Wheelhouse told BBC Scotland the country needs a fairer distribution of land.
Estate owners have challenged whether the concentration of land ownership is a problem.
BBC Scotland's environment correspondent David Miller reports.
Watch BBC Scotland Investigates: The Men Who Own Scotland tonight on BBC One Scotland at 22:35.