Power corrupts and it has corrupted Vladimir Putin absolutely. As the drama in Ukraine continues, we examine the mind and motivations of the man responsible.

Ian H Robertson, Professor in Psychology at Trinity College Dublin and author of The Winner Effect: How Power Affects Your Brain, explains how over time the need for power messes with the synapses and induces megalomania. The Professor tells us that the only way the West can get under Vladimir Putin's skin is through practical sanctions.

Benedict Brogan and Con Coughlin discuss what those sanctions might look like, and if Britain even has the interest or clout to help resolve this dangerous crisis.