SUPPLEMENT: GENETIC RELATIONS HEXACO – IDEOLOGY 1 Supplemental Information: Relations between HEXACO personality and socio-political ideology are mostly genetic in nature Reinout E. de Vries † , Laura Wesseldijk, Annika Karinen Vrije Universiteit Amsterdam Patrick Jern Åbo Akademi University Joshua M. Tybur Vrije Universiteit Amsterdam † Corresponding author: Vrije Universiteit Amsterdam, Institute for Brain and Behavior Amsterdam & Department of Experimental and Applied Psychology, Van der Boechorststraat 7, 1081 BT, Amsterdam, The Netherlands; e-mail: re.de.vries@vu.nl