Sorry, but global warming is a hoaz, the warming stopped in 1998, but of course is never mentioned. Not that the world hasn't warmed up some from the last ice age and, more recently, from the mini ice age that ended about 1850, but as of right now it is not warming. The warming it did in the 20th century was miniscule and never posed any threat to the planet.
On the other hand you are entirely correct about it not being man made, warming trends and ice ages are common in our past and there is no reason to assume they will not be common in our future.
Nope
You're not the first to put forth this misinterpretation as accurate. It's not. 1998 was the warmest year in the observational record (going back to about 1880 or so) because it was an big El Nino year added to the warming trend that began in the mid-1980s. Examining the full record shows that all El Nino years are warm years (there are good meteorological reasons for that). Several not-quite-as-warm years have followed 1998. Last year was just barely under the 1998 record (some analyses put 2005 ahead of 1998) -- and there was no El Nino. Unless there are really unusual circumstances, the next El Nino year will exceed the 1998 record. This year could actually exceed the 1998 record without an El Nino, and then where will you be?