If you just joined us, you’ve happened upon an attempt to cover the vast ocean of contributions to what we know as the ‘soul’ today.
Quick recap: initial consideration of the soul began circa 200,000 BC, which lead to organized religion circa 9831 BC. Earliest written records date to around this time, and the first human considerations of the soul, religion and afterlife are evident from the remnants of ancient Egyptian culture. Worldwide, a boom in philosophical thought took place circa 5th century, which lead to Christianity, Islam, Buddhism, Hinduism and many other religions common today. We have this philosophical boom to thank in large part for Western concepts of Dualism. There isn’t much to note about the soul between the 5th and 16th centuries due the advent of monotheistic religions, which diverted focus from the individual soul to an omnipotent God. We last left off in the 17th and 18th centuries with Descartes and scientific research on the pineal gland.