Sam, it seems that there was plenty in judaism that is not unique to us. Some of mishpatim is mentioned in the code of hammurabi, etc
yytz – my main issue with the topic of gilgulim is if they are part of the cycle of life, how could it not be in the Torah (or at least elsewhere in Tanach)? i.e. is the time of the Zohar or when the Ramban discussed it coincide with it picking up popularity with Eastern religions?