https://www.youtube.com/watch?v=F-QA2rkpBSY&list=PL580F6DB7401908BE&index=2&ab_channel=wonderingmind42 The main points are:

• that at 7% growth rate (hey, what's your student loan APR?), something doubles every 10 years.
• At each iteration, you consume/generate more than the sum of what's been generated/consumed historically until now.
• With unconstrained exponential growth, you have "abundance" of resources, e.g. half of all available resources, one iteration before the whole resource is depleted. In other words, without arithmetic and preemptive thinking, you don't realize there is a problem until it's too late.