Conversation so far:
What types of hereditary peers existed?
Conservative hereditary peers.
What is the definition of Conservative hereditary peer?
CANNOTANSWER.
What is the role of a hereditary peer?
peerage was sometimes seen as an impediment to a future political career.

Question: How was it seen as an impediment?
Self-contained rewrite: How was peerage seen as an impediment to a future political career?