The 'collective unconscious' was discussed by Carl Jung. What evidence exists that we have a collective unconscious?

The evidence  that we have on unconscious is instincts and archetypes

Explanation:

1.Archetypes:

2.  Instincts:

cancer may have started a fight but will finish it.♡

use of tobacco (chewing or oral intake–cause of oral cancer)

.premature or childhood pregnancies and lack of sexual hygiene (causes in cancer of ovaries and uterus of women)

.use of contraceptive pills of oral use and childlessness among women who never breast-feed (causes in breast cancer)

smoking (cause of lung cancer)

other environmental causes

air and water pollution

excessive exposure to radiation

eating and sleeping habits in violation of the laws of natural living

suppressive and unnatural (body unfriendly) treatment of common diseases

excessive exposure to harmful chemicals of the following types—

benzene

arsenic

chromium

cadmium

asbestos

vinyl chloride

polycyclic hydrocarbons etc.

below are types of cancer:

lung cancer

prostate cancer

colorectal cancer

bladder cancer

breast cancer

melanoma

kidney cancer

liver cancer transplant

pancreatic cancer

thyroid cancer

cervical cancer

colorectal cancer

lymphoma

ovarian cancer

skin cancer

uterine cancer

vaginal and vulvar cancers

it would be a lot of diff ones. hope this ! < 3 : )