Berkeley的Personal History Statement的疑问

Berkeley关于这个Personal History Statement有好几种要求：

Your Personal History Statement should convey how a combination of life experiences, idealism, role models, education, and work experiences have influenced your decision to apply.

Personal History Statement

Required of all applicants. Please note that the Personal History Statement should not duplicate the Statement of Purpose.

Please describe how your personal background informs your decision to pursue a graduate degree. Please include information on how you have overcome barriers to access higher education, evidence of how you have come to understand the barriers faced by others, evidence of your academic service to advance equitable access to higher education for women, racial minorities, and individuals from other groups that have been historically underrepresented in higher education, evidence of your research focusing on underserved populations or related issues of inequality, or evidence of your leadership among such groups.

这个到底应该怎么写？写过去的经历的话感觉和Statement of Purpose重复了，如果不能重复的话那我写的经历又和申请的方向无关。。。

能不能写和申请方向没什么关系的经历呢？