Have a look to the origins of ayurveda over 5000 years ago, how it spread over India and Sri Lanka.
See the decline under colonial rule and the renaissance after independence.
To understand how ayurveda works you have to understand the principle of the 5 elements.
Have a look to this fascinating presentation of the 5 elements an how they build the 3 doshas vata,
pitta and kapha.
Herbalist Candis Cantin explains the concept of pita, one of the three Ayurvedic doshas.
Kumudini explains the secrets of Ayurveda!