Twin studies manipulate the environmental factors of behavior by examining if identical twins raised apart are different from twins raised together. Before the advancement of molecular genetics , twin studies were almost the only mode of investigation of genetic influences on personality. Heritability was estimated as twice the difference between the correlation for identical, or monozygotic, twins and that for fraternal, or dizygotic, twins. Early studies indicated that personality was fifty percent genetic. Current thinking holds that each individual picks and chooses from a range of stimuli and events largely on the basis of his genotype creating a unique set of experiences; basically meaning that people create their own environments. 
Larry Chase is a decorated United States Air Force Veteran who served in the Intelligence Service and Strategic Air Command. His 25 year private sector career has earned him international acknowledgement for every program he has founded and/or led. As a pioneer in holistic enterprise risk and resiliency management, Chase has earned unprecedented success in executive support and programmatic business value. Throughout his career, he has built highly-touted BCM programs and cultures across Fortune 100 organizations in the banking, pharmaceutical, manufacturing, utility and security protection sectors. As a survivor of the earthquake in Japan and Hurricane Katrina, Chase leverages lessons from these ground zero experiences in his "practice like you fight" methodologies and collaborative efforts to enhance BCM program maturity.
During his tenure as the Senior Director of Symantec Enterprise Resiliency Organization, global program maturity has increased three full levels and is becoming an emerging model to full scale international operational exercises. The program has also been driven by an historic executive level of visibility and budget allocations.
Chase continues to serve on numerous public and private sector boards and advisory committees, including acting as a current chair of the SunGard International User Group Board. Chase is a strong supporter of Wounded Warrior Project, Veterans Employee Resource Group Officer and an avid fund raiser for the Children's Organ Transplant Association. He is also passionate about music and is a performing musician.